hello guys. usually when phone's plugged in to my computer for file transfer or after that, i cant use the phone. when i press the power button, the screen stays black and i cant touch anything, while the 4 touch buttons are lit up. its very annoying as i have to do the battery-yank thing and turn the phone on again. any solutions?
Yeah. Same think happened to me when my SD Card had bad sectors. Just buy a cardreader and scan and attempt to repair'em. If that doesn't help, just make a back up on your PC, format your SD Card and backed it up.
Hope it works for you too...
P.S. When I was using with my phone during file transfer and my phone freezes, it doesn't go black but stays with the current "frame" and just the LED lights. I don't know what's in your case.
Check this thread out. It is pretty much the same thing.
http://forum.xda-developers.com/showthread.php?t=1175952
Also you can use Androidini Open Recovery to check your sectors on the SD card. Works for me.
Hello,
So I have a bricked KGL MTCD unit. During the update process with Malaysk's most recent FUSE 5.1 ROM, the ignition was turned on, causing the screen to briefly go black, then back to the Android robot with the update status bar, and a second later the unit died.
I read in another thread that I started regarding this that it is possible to debrick an Android headunit using drivers and the RK Batch Tool. I downloaded everything from the Rockchip.nl site.
When the unit is hooked up to power only the button lights light up and that's it. No response whatsoever.
I tried hooking it up with a male-male USB cord to my Lenovo T410 laptop but there is no response from Windows regarding recognizing a USB device.
I have tried every USB port. I've tried both ports on the device and still nothing.
I have tried USB only and external power too. Nothing works.
I have also tried connecting a different, 100% working KGL unit. I hooked it up to power, then tried both USB ports and the computer doesn't recognize any.
Can anybody please tell me how to restore this thing?
Do I need to install the drivers into Windows first? I thought my PC would surely recognize the device and THEN ask for drivers. How do I go about installing them?
Thanks in advance
EDIT!!!!!!!!!!
DEBIRCKED THE UNIT WITH MALAYSK'S METHOD FROM THIS POST http://forum.xda-developers.com/showpost.php?p=67184851&postcount=50
Unbricking MTCD GS
My MTCD GS RK3188 800x1024 Android 5.1.1 radio in my W220 Benz is also bricked.
It came with ROM v. 1.34 I think. So I flashed the most recent OEM ROM I could find (I think v. 1.73) through Settings/About/System Upgrade, hoping to be able to root the radio so I could use Titanium Backup.
Everything went swimmingly and all was good with the world.
Except I still couldn't root through recovery. So I tried to flash Malaysk's most recent GS pre-rooted ROM.
About half way through the process, the screen unceremoniously went black.
Now the radio is bricked. Only the button lights illuminate.
I tried several methods of rebooting into recovery, but nothing happened.
I read the HuiFei page, searched the XDA forums and the Internets generally and still could not find a solution.
I connect the radio to my computer via USB and tried to use the RKTools program, and still no luck.
I hope I missed something somewhere in my searching, so I beg of you: If anyone out there knows how to unbrick this unit, please, PLEASE share your knowledge with me.
Thanks in advance.
I just tried to update my Xtrons unit from a firmware on their site. Update finished 100% and upon reboot the screen was just black!!! There has to be a way to unbrick these. No way am i tossing out a $400 unit! I have a PF73AA4A which i believe is a RK3188 quad core 16g. Please help!
Solved! Mtcd unbricked!
@NaviPR, @shawndak and anyone else suffering the same fate:
I quite accidentally figured it out! Here's what I did (sorry, I tend to over-include information)
It started when I found a link on the Android TV Box forum about debricking RK3188 TV boxes. There was a process where the NAND was reset and then set to Mask Mode by shorting pins and pressing buttons; then the firmware was flashed with RK Batch Tool.
So I loaded RK Batch Tool and driver onto my Windows 10 computer, brought the head unit in and removed the bezel to expose the SoM.
Sadly, this SoM used a different NAND chip that did not have visible pins. So I started messing around.
At first, I couldn't get the PC to recognize the HU after trying the standard recovery process. Finally, out of frustration and without expecting any results, I tried one last thing. These are the steps:
1. Download Rockchip DriverAssistan v.4.4 and RockChip Batch Tool 1.4 zip files.
2. Extract files from each into separate directories.
3. Run Driverinstall.exe.
4. When done, run RKBatchTool.exe
5. Load your desired firmware into RK Batch Tool by pressing the dots button after the "FW Path" field.
6. Power the HU by connecting the 12V (yellow), ACC (Red) and ILL (orange) wires with 12 volts with a benchtop power supply. (Orange isn't really necessary, but it made me feel better to see the lights on.)
7. Connect the HU to the computer with a USB cable.
8. Press and release reset and wait 10 seconds.
9. Press and hold the power button for 10-15 seconds as if you were turning it off normally.
10. Release the power button and within 1 or 2 seconds press and hold it again for another 10-15 seconds until you hear your PC indicate it's loading a driver. At this point RK Batch Tool should show a connected device and the number 1 will light up blue.
11. Press the "Restore" button on RK Batch Tool. The number 1 will flash yellow while it uploads the firmware.
12. When done, repeat steps 8 and 9. The splash screen and logo screen should show up after a short while.
13. After unsuccessfully waiting a long time for it start the launcher, press reset.
14. Wait for HU to boot up and go into whatever flavor launcher you are using.
Two things to note:
1. It was helpful using a power supply with a current meter so you can actually see the current drop that indicates it's ok to release the power button and press it again.
2. When the firmwareI sideloading completed, RK Batch Tool showed a red error message "<Layer 2-6> Download Firmware Fail." Do not worry. Disregard the error message and continue with the steps.
I hope this works as well for you as it did for me.
Let me know and feel free to contact me if you're having trouble. Good luck! :laugh: :laugh:
@ibdegen
Thanks for the help, I followed your guide to the letter but unfortunately it didn't work.
Here's what I did:
- laptop runnin' Windows 7
- tried both USB ports in the unit - 3G and USB
- installed the drivers, installer said everything went fine
- I'm using a tabletop power supply which is working fine
Here's what happens:
I power UP the HU, doesn't matter if I plug in USB or 3G.
This unit is totally bricked. Only the lights in the buttons work.
I press Reset and RELEASE IT right away. When pressed the lights go off, upon depressing they turn back on.
I wait 10 seconds, I press hard on the power button, the lights go off but come back on around 10 seconds later.
I depress it, lights go off, I press hard again within a second or two, lights go on, and then nothing.
I've done this many times and nothing works.
I started frantically pressing the Power button out of frustration and I think I heard the standard "new USB device connected" sound of Windows 7 ONCE, but nothing really happened.
Wife has the car at work right now so cannot try this until later. My unit is a MTCB. Do you think your method will still work? I saw the RK3188 Android TV Mask mode as well but didn't want to risk it since the person i bought it from is willing to attempt a repair/replacement. I found the proper MCU GS file and will flash that with a 5.1.1 Fused Rom so i can use the full internal space! Will report back if all goes well. Thank you
Also noticed i cannot flash a MCU alone with the batch tool. update_5_1_1_FUSE_1024X600_RK3188_04_MAL_06_09_2016_MTCB This is the closest firmware I can find that may work for my MTCB GS unit. Will it work?
Possible Extra Steps
NaviPR said:
@ibdegen
Thanks for the help, I followed your guide to the letter but unfortunately it didn't work.
Here's what I did:
- laptop runnin' Windows 7
- tried both USB ports in the unit - 3G and USB
- installed the drivers, installer said everything went fine
- I'm using a tabletop power supply which is working fine
Here's what happens:
I power UP the HU, doesn't matter if I plug in USB or 3G.
This unit is totally bricked. Only the lights in the buttons work.
I press Reset and RELEASE IT right away. When pressed the lights go off, upon depressing they turn back on.
I wait 10 seconds, I press hard on the power button, the lights go off but come back on around 10 seconds later.
I depress it, lights go off, I press hard again within a second or two, lights go on, and then nothing.
I've done this many times and nothing works.
I started frantically pressing the Power button out of frustration and I think I heard the standard "new USB device connected" sound of Windows 7 ONCE, but nothing really happened.
Click to expand...
Click to collapse
@NaviPR
Sorry it didn't work. I'm encouraged if in fact the computer chimed.
First try the same thing, but hold the buttons longer, e.g. reset 10 secs, power 20 secs. after reset release.
Also, I did 2 other things before the hard off/on process but didn't think they were related. Maybe they are:
A. Try to get into recovery by:
1. Turning 12V on while holding the power and reset buttons.
2. After 5-10 seconds, release the reset button and keep pressing the power button for another 10-15 seconds
3. Release the power button; within 2 seconds press it again and hold another 10-15 seconds; release
4. If no boot logo shows up after a minute or so, try the hard off/on procedure.
B. Reset the NAND chip (I found nothing to confirm this is how it's done. I just assumed.)
1. Remove the front bezel to expose front of SoM board. Be careful not to damage the ribbon cables.
2. There are 2 pairs of silver test-point looking dots on each side of the NAND chip (see picture)
3. With power disconnected, short each pair individually.
4. Do A again. Then do my hard off/on procedure, holding the buttons longer.
Again, the key is to get the PC to chime and RK Batch Tool to show a connected device.
I don't know if the difference between Windows 7 and Windows 10 had anything to do with it, but you may want to consider it. Maybe try an older RK Batch Tool version with Win7. Also, try a different USB cable.
Hope this helps.
MTCB vs MTCD
shawndak said:
Wife has the car at work right now so cannot try this until later. My unit is a MTCB. Do you think your method will still work? I saw the RK3188 Android TV Mask mode as well but didn't want to risk it since the person i bought it from is willing to attempt a repair/replacement. I found the proper MCU GS file and will flash that with a 5.1.1 Fused Rom so i can use the full internal space! Will report back if all goes well. Thank you
Also noticed i cannot flash a MCU alone with the batch tool. update_5_1_1_FUSE_1024X600_RK3188_04_MAL_06_09_2016_MTCB This is the closest firmware I can find that may work for my MTCB GS unit. Will it work?
Click to expand...
Click to collapse
@shawndak-
I'm sure the MTCB HU uses a different SoM board. With any luck, it's the board that has a NAND with exposed pins like the one in the RK3188 TV Box unbrick thread. If so, try the following procedure:
-Reset NAND by shorting pins 5&6.(See picture)
-Open RKBatchTool.
-Press and hold Reset / Short pins 7&8 / Plug in USB cable at same time (requires 2 hands or contortionist LOL)
-Release Reset after device appears in RK Tool.
According to the thread I borrowed this procedure from, the HU should only be powered through the USB cable. However, if it doesn't work that way, try connecting it to a separate power supply and turn it on after plugging in USB cable.
Good luck!
PS. Sorry, I don't know if the FUSE firmware will work on the MTCB. @Malaysk has separate sections for MTCB/MTCC firmware and MTCD firmware, so you may want to confirm that you sourced the firmware from the correct section.
PPS. I want to credit the author of the TV Box thread, but I can't find it again.
UNBRICKED!!!! I hooked up the laptop with the drivers installed and batch tool open. Loaded the firmware. Then i did this exactly,
1. Turning 12V on while holding the power and reset buttons.
2. After 5-10 seconds, release the reset button and keep pressing the power button for another 10-15 seconds
3. Release the power button
Boom computer recognized the device. I pressed restore and it flashed the unit in about 5 minutes. Then it booted up!!!! Feeling invincible I loaded the 5.1.1 rom over the 4.4.4. Everything worked! I have Android 5.1.1 on a PF73AA4A MTCB GS MCU!!! So when are we getting Marshmallow? lol Nougat? The Fused rom is amazing, so much room for activites!!! Thanks everybody!
@shawndak Tried your method, doesn't work.
Try a different computer. You said a male to male cord, are you using a usb to usb B (mini) and plugging it into the front of the unit?
Make sure you have the most updated tools as well https://androidmtk.com/download-rockchip-factory-tool. You have to install the drivers!!!! They are located at the bottom of that page!
@shawndak The unit doesn't have a front USB, only back USBs.
NaviPR said:
@shawndak The unit doesn't have a front USB, only back USBs.
Click to expand...
Click to collapse
Whats the model? Can you send a link or a picture?
@shawndak It's just a KGL model for a pre-lifting W203 Mercedes-Benz without a front USB.
I've already unbricked that one + two other units using @Malaysk's other method http://forum.xda-developers.com/showpost.php?p=67184851&postcount=50
It worked 100%, although I had to use a USB drive.
All you have to do is create a recovery card using the program from the post, get a USB drive, load some factory firmware onto it, then insert the card into the GPS slot and the pendrive to the USB. Then, if the card initializes recovery but gives you an error message, remove it - it will go into regular recovery mode - and update from the USB.
NaviPR said:
@shawndak It's just a KGL model for a pre-lifting W203 Mercedes-Benz without a front USB.
I've already unbricked that one + two other units using @Malaysk's other method http://forum.xda-developers.com/showpost.php?p=67184851&postcount=50
It worked 100%, although I had to use a USB drive.
All you have to do is create a recovery card using the program from the post, get a USB drive, load some factory firmware onto it, then insert the card into the GPS slot and the pendrive to the USB. Then, if the card initializes recovery but gives you an error message, remove it - it will go into regular recovery mode - and update from the USB.
Click to expand...
Click to collapse
Very interesting. Perhaps slow format those cards and attempt it again. If not try a warranty claim with whomever you bought it through. Good luck!
@shawndak I don't think the card is at fault here.
Anyway, read Malaysk's guide and follow it to the letter. In case your unit gives you an error message saying that you have to remove the card, do it and you will be dumped into regular recovery mode with the USB stick still plugged in. Just load the firmware from there.
Like I said, I've unbricked 3 KGL units using this method.
@NaviPR
Did you try both of my alternative methods?
It shouldn't matter that the USB port is not on front other than having to remove the HU to access the rear ports.
Admittedly, I also have a W203 so I know it's not as easy as removing the HU from a W220.
However, it sounds like @Malaysk's method is better because you don't have to remove the HU, etc. Is that right?
Wish it popped up during my search. Would have saved me a lot of time if it worked.
Nevertheless, since @ShawndaC and I were successful with my solution(s), maybe yours bricked under different circumstances.
using malaysk technique I can fix 60% of bricked devices I get
another 40% need the hardware repair and parts.
I repair many head units daily
shawndak said:
UNBRICKED!!!! I hooked up the laptop with the drivers installed and batch tool open. Loaded the firmware. Then i did this exactly,
1. Turning 12V on while holding the power and reset buttons.
2. After 5-10 seconds, release the reset button and keep pressing the power button for another 10-15 seconds
3. Release the power button
Boom computer recognized the device. I pressed restore and it flashed the unit in about 5 minutes. Then it booted up!!!! Feeling invincible I loaded the 5.1.1 rom over the 4.4.4. Everything worked! I have Android 5.1.1 on a PF73AA4A MTCB GS MCU!!! So when are we getting Marshmallow? lol Nougat? The Fused rom is amazing, so much room for activites!!! Thanks everybody!
Click to expand...
Click to collapse
5.1 working normaly or lil bit lagY?
I've tweaked it a bit so it's running pretty dang good. I'd wait for the update that's coming out soon!
Hi all. I've been given a Tesco hudl 2 that has turned into a paper weight and basically tesco have washed their hands from it.
It has a common error 'No boot device. Hit ok' - but there is no response from screen or power/volume buttons to enter 'ok'
I plugged in a usb keyboard via OTG adapter and pressed enter which takes it to Boot Manager - with sub menu - Boot Options Menu
but there are no options to select and pressing enter just flashes the screen.
I have tried the factory hard reset option and doesnt work. Just turns on and turns off.
There is no charge light when plugged in, but does turn on to, again 'No boot device. Hit ok'
There is no adb access
I absolutely hate wasting tech and like to use them for other uses. Anything that can be done here?
Is the motherboard blitzed someway.
Anyway to flash a rom via SDcard or force some sort of bootloader access or recovery?
Can the rom be flashed with hardware directly on the chip (tho I don't have the equipment, just a query).
Its suppose to be a good enough IPS display with 1,920×1,200.
Ok now for the out of box ridiculous thinking. Can the mainboard be replaced with another brand of tablet with perhaps better specs.
Can these LCD panels interface with other systems at all, to perhaps a laptop via some sort of display board for a possible car project?
A lot of questions, but hope someone can shed some light. I love finding things out and fixing things, if possible.
Thanks
bump
I have replaced a dead hudl2 charging port and battery all i am getting is a faint green light but not always. however still not booting any ideas please