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Upgrade to WM6 without USB?

Hey everyone, I'm new here , and I thought I'd start with a quick question.
My HTC Universal is a bit handicapped (bought it off a friend who said it was broken, apparently the USB plug terminals weren't fully soldered, but I couldn't connect all of them and it will only charge through USB and nothing else.)
If someone has an HTC schematic or a high-res image of the motherboard, I could possibly try to revive USB transfer capabilities (but that area is a bit damaged from not having a small enough soldering iron ), *OR*, if there is a way to reflash from within the OS using a SD card, that would be great.
Hope someone knows the answer to this, thanks!
Edit: And if it's of any possibility, how much would a replacement board be? Enough to satisfy a 100% working USB connection?

No ideas? If someone can at least give me a schematic or a high-res pictures of both sides of the board then I could possibly fix the USB to 100% functionality.

If you check the WIKI for the Universal you shoul be able to find a link for downloading the Service Manual. It shows the total un-assembly-re-assembly process step by step. You may also find instructions for SD flashing there as well. I have never flashed my Uni by SD, but I have don other phones like that. Most of the HTC's are capable. There is even info in the Service manual telling you what to have on the SD and wht to name the files from proper use. Give it a search.

Thanks! I have the manual already so I'll give it a look over. I wasn't entirely sure and I thought I wouldn't see anything but I'll look more in-depth .
Just a side note, does anyone know where I can get a replacement motherboard and how much it will be? Just curious, as that option might be available if it isn't too expensive.

Replace NAND chip

HELLO,
i would like to try to replace the nand chip of my bricked tv box with a new chip
this because the original chip has been damaged shortening two pins trying to put the device in mask rom mode
my device is t-r42 based on rk3188
the price of the nand flash is about $4,
i can found it on some chinese online store
i hope that replacing the nand, my device will go to mask rom mode, enabling me to do the firmware loading through pc (rkbatchtool)
i know that this mode has been designed specifically to load the firmware the first time,
so i hope my device will go to this mode the first time i power on it after replacing it
any suggestion?
any hint?
i know this must be done with :microscopic` attention
thanks!!

Vicolodo said:
HELLO,
i would like to try to replace the nand chip of my bricked tv box with a new chip
this because the original chip has been damaged shortening two pins trying to put the device in mask rom mode
my device is t-r42 based on rk3188
the price of the nand flash is about $4,
i can found it on some chinese online store
i hope that replacing the nand, my device will go to mask rom mode, enabling me to do the firmware loading through pc (rkbatchtool)
i know that this mode has been designed specifically to load the firmware the first time,
so i hope my device will go to this mode the first time i power on it after replacing it
any suggestion?
any hint?
i know this must be done with :microscopic` attention
thanks!!
Click to expand...
Click to collapse
your going to have to find someone with a hot air rework station to unmount and or remount a new chip. the thing of it is, the pcb has to have perfect traces,,, 0 damage. even if that is met, unmounting and remounting a new chip in a perfect world takes a lot of skill and experience. will it get you into mask rom mode,,, I would guess yes. far as I understand it, thats a hardware thing not a os thing (os=firmware). Unless its something you just want to tinker with just to see if you can do it I wouldnt bother. Thats just me. I have crashed units over and over and got into mask rom mode doing the pin short, purposely trying different firmwares to see if they would work. I am not sure if mask rom mode will happen with out the pin short on a blank chip. maybe thats another question.
if you find someone local that does rework on surface chips, best bet would be ask them. Also a better answer here at least for me would be a close up picture of the chip you speak of, it would probly tell a thousand words. I have done rework, not in the past 5 years but I have. it takes a extremely steady hand and a good feel for when the solder is fluid. Theres tricks to it, do it wrong and theres no fixing the torn traces. Maybe craiglist would point you to someone who does this sort of work in your area. Possibly a local flat screen tv repair center may be able to direct you to someone local also, they are packed with sm chips.
Just some thoughts

stinkster said:
your going to have to find someone with a hot air rework station to unmount and or remount a new chip. the thing of it is, the pcb has to have perfect traces,,, 0 damage. even if that is met, unmounting and remounting a new chip in a perfect world takes a lot of skill and experience. will it get you into mask rom mode,,, I would guess yes. far as I understand it, thats a hardware thing not a os thing (os=firmware). Unless its something you just want to tinker with just to see if you can do it I wouldnt bother. Thats just me. I have crashed units over and over and got into mask rom mode doing the pin short, purposely trying different firmwares to see if they would work. I am not sure if mask rom mode will happen with out the pin short on a blank chip. maybe thats another question.
if you find someone local that does rework on surface chips, best bet would be ask them. Also a better answer here at least for me would be a close up picture of the chip you speak of, it would probly tell a thousand words. I have done rework, not in the past 5 years but I have. it takes a extremely steady hand and a good feel for when the solder is fluid. Theres tricks to it, do it wrong and theres no fixing the torn traces. Maybe craiglist would point you to someone who does this sort of work in your area. Possibly a local flat screen tv repair center may be able to direct you to someone local also, they are packed with sm chips.
Just some thoughts
Click to expand...
Click to collapse
thank you very much,
i will let you know!!

Vicolodo said:
thank you very much,
i will let you know!!
Click to expand...
Click to collapse
A quick alternative for establishing that it is only a faulty NAND is to try booting Linux from an SD card. If that works, then you could look around for someone who has created running Android from SD card for your device and you could at least still use your device in the interim.

[Q] HELP :: Dead Phone - Just want some stuff on the SD card

Hi folks,
My nexus 5 died in a watery hellfire of childrens and sugar. I would like to salvage some of the info that was on the "SD card" but didn't know if anyone had a guide - I tried searching the forum "remove sd card" but no dice. Any thoughts or guides that i'm missing?
Thanks!

You won't be able to 'remove' the memory, it is not a classical sd card as the ones you can buy, it is a chip welded on the circuit board...
It will be hard to access the data directly (not through the phone), but your best luck is to disassemble your phone, locate the memory chip, find the pins pattern, and find a way to connect all that to a computer...
Wish you luck
PS : Maybe there are ways i'm not aware of, but I your phone is really dead, I don't know any other
Edit : This doesn't seems to be an easy at all manipulation, you'll need the help of a professionnal I'm afraid

Mynix said:
You won't be able to 'remove' the memory, it is not a classical sd card as the ones you can buy, it is a chip welded on the circuit board...
It will be hard to access the data directly (not through the phone), but your best luck is to disassemble your phone, locate the memory chip, find the pins pattern, and find a way to connect all that to a computer...
Wish you luck
PS : Maybe there are ways i'm not aware of, but I your phone is really dead, I don't know any other
Edit : This doesn't seems to be an easy at all manipulation, you'll need the help of a professionnal I'm afraid
Click to expand...
Click to collapse
Almost impossible actually - the emmc is very solidly glued to the mainboard. And to top it off it's a BGA package. I don't know many who would dive into it .
Best best would be to open it up , soak it in IPA , wash with demineralized water , dry , remove all non-vital parts ( camera , microphones , nfc and so on ) and try to boot it up.

Niflheimer said:
Almost impossible actually - the emmc is very solidly glued to the mainboard. And to top it off it's a BGA package. I don't know many who would dive into it .
Best best would be to open it up , soak it in IPA , wash with demineralized water , dry , remove all non-vital parts ( camera , microphones , nfc and so on ) and try to boot it up.
Click to expand...
Click to collapse
I bet with a lot of money and skills it can be done, far beyond the value of the data on the chip

For sure ! I've asked a friend (electronic design engineer) for a quote and ... he says the lowest he's seen for this type of data recovery is 150$ an hour , with a minimum of 6 hours and no guarantees.

Niflheimer said:
For sure ! I've asked a friend (electronic design engineer) for a quote and ... he says the lowest he's seen for this type of data recovery is 150$ an hour , with a minimum of 6 hours and no guarantees.
Click to expand...
Click to collapse
haha sounds about right...

NAND Replacement for the TF700

This was a PM for @timduru but it wouldn't send.. So here it is for anyone and everyone that can help.
I'm thinking of replacing the nand on the tf700.. Can you help me source the right pin compatible chip? .. I don't have big plans for the tab, I only use it to read books and watch movies.. But the lag bugs me and I want to attempt the chip replacement job. I'm totally clueless as to the fastest chip that could be supported with the right pin configuration.
But I'm hopeful i could drop something beastly and perhaps give it a ram upgrade if the RAM is a separate and easily source-able chip.
I believe the fastboot mode along with the saved "wheeler" blobs will enable me write firmware and start the tablet with the blank new chip.
If I'm successful, i could do the same for other members who want to keep the development of the tab going(with them sharing the risk of failure/I'm not an idiot, but a botched solder job is possible) .. So that we can have one last stable ROM until the eventual death of the tab.
Thank you,

Please keep us updated on what you find out. I am still addicted to this tablet and use both the 700 and the 201 (for different functions of course!) I would also be curious about battery options out there..

Chip Replacement for the TF700
I'm thinking of replacing the nand on the tf700.. Can you help me source the right pin compatible chip? .. I don't have big plans for the tab, I only use it to read books and watch movies.. But the lag bugs me and I want to attempt the chip replacement job. I'm totally clueless as to the fastest chip that could be supported with the right pin configuration.
But I'm hopeful i could drop something beastly and perhaps give it a ram upgrade if the RAM is a separate and easily source-able chip.
I believe the fastboot mode along with the saved "wheeler" blobs will enable me write firmware and start the tablet with the blank new chip.
If I'm successful, i could do the same for other members who want to keep the development of the tab going(with them sharing the risk of failure/I'm not an idiot, but a botched solder job is possible) .. So that we can have one last stable ROM until the eventual death of the tab.
Thank you,[/QUOTE]
Hi,
once I started going about it as well and found Elpida EDJ4216EFBG in our unit to seem very similar to the Samsung K4B2G1646C ddr3 chip.
Pinout seems very close except for T7 which is not connected in elpida but its an address pin A14 in samsung I do not know the implications had these chips to be interchanged. Also the ram in my unit is a hynix. Good Luck.

evimarn said:
Hi,
once I started going about it as well and found Elpida EDJ4216EFBG in our unit to seem very similar to the Samsung K4B2G1646C ddr3 chip.
Pinout seems very close except for T7 which is not connected in elpida but its an address pin A14 in samsung I do not know the implications had these chips to be interchanged. Also the ram in my unit is a hynix. Good Luck.
Click to expand...
Click to collapse
I'll look into the ram when I get the chance.. I was hoping that the pinouts are standard.. I don't think that data lines are redundant in general.. We'll have to ask around or try it for ourselves.
You don't happen to already know any super fast NAND chips with the same pinouts or even the mmc versions supported by the tegra?
Can you PM me the datasheets?

If you manage to pull this off, you will all be my heroes.

PortableTech said:
If you manage to pull this off, you will all be my heroes.
Click to expand...
Click to collapse
I'm a dentist.. I'm looking for someone to do the heavy technical work because searching for these things even with my knowledge is hard.. I'm sure there are ways for design that are learned in engineering school or on the job that I'm not ever going to learn...
The work with steady hands can be left to me.. I already have a few super hard reballing feats under my belt.
I'm really puzzled as how to approach this..
I will go through my library and find you the NAND datasheet as I've downloaded it years ago.
I guess i will start at digi-key and mouser and see what happens.
Wish me luck.

AbdouRetro said:
I'll look into the ram when I get the chance.. I was hoping that the pinouts are standard.. I don't think that data lines are redundant in general.. We'll have to ask around or try it for ourselves.
You don't happen to already know any super fast NAND chips with the same pinouts or even the mmc versions supported by the tegra?
Can you PM me the datasheets?
Click to expand...
Click to collapse
Basically if memory serves me right the samsung are the best bet.

PX5 cannot boot anymore (SOLVED)

UPDATE 24.11.20
I have recovered my HU by reading the whole night on this forum and TO THE AMAZING work of several people here.. especially GREAT GREAT thanks to marchnz and to scorillo_ro I build myself the USB cable and followed all the instructions I could find. With some moments of headache .. finally I flashed a new ROM and it booted up!!!
I have to go down on my knees to you guys for the super AMAZING work you have done. Wihtout you I woulld be now 180€ poorer. (new HU).
___________________________
When booting I get this errors...
I got a MTCE_LM PX5 unit (8Core A53 CPU 2GB RAM)
It is always very difficult to enter Recovery so I tried several times but it doesnt work. Either I just didnt mage it right or the recovery is broken.
In the pictures you can see 2 different messages. I have the feeling the long message version is when it normally tries to boot into the OS but fails.
The short message looks like when I managed to get into recovery reboot but it fails too.
Or its the same message .. it just blinks up for 10ms or something and dissapears and then blinks back after 5 secods ... I had to take like 20 photos to catch it. So maybe its the same actually.
Anyone has a clue what I can do from now on?

Great to hear another success story.
It took alot of effort to develop the method, for which was made possible by a member posting the schematic diagram to the forums for the benefit of all. Your post helps other too, so thanks!

Thanks again for the endless hours you put into developing the esiest method possible (for this SOM).
I am REALLY pissed at the Chinese somehow. They develop great stuff sometimes but fail to think over the edge. It is so easy to destroy your OS by small or stupid mistakes. And then there is no OTG to easily reflash the rom. I mean the hardware supports it. They could (and luckily and finally some new models support OTG on at least one USB port right away). But why was this not implemented right from the first designs for the headunits is puzzling me.
I would love to help anyone who needs help. But I have the PX5 HCT V4 SOM so you people wrote exactly how to do it for this specific SOM... I am not sure I can add anything of what wasnt said already.
I just had 2 main issues. The USB cable was found but not recognized at first.
So what I figured out was that you should not use more than 2 resistors to make the voltage division (thats what I did first) and I just had 2.8V on the division. I did it fast and not clean, means. No really good soldering connections.
Then I rebuild the whole thing used a good cable just 2 resistors (2kOhm and 3.3kOhm) and I soldered everything as clean and as compact as possible with least distanced to each part. So it gave me 3.1V on the division.
This was recognized immediately. Ahh.. and it helps too if you can use some contact spray for electronic parts. Because the pins sometimes do not sit well inside the SOM board.
Then the flashing of the ROM didnt want to work. It gave me an error on downloading the firmware.
Solution was to simply erease the flash memory.
But everyone who goes to your thread and reads at least the first 20 pages gets rather the clue on the minor issues. But its actually all written in there... just need to read it