jmcr

Thanks for the steps. I get no vibrate response from phone with hard reset, Vol Up + Power, also no response with button on the back. Phone gives no LED lights or LCD activity or vibrate response.

It seems no detection in device manager. I tried to repair with PC Companion, it asks to connect phone into flashmode with Vol Down then USB plug, I do that but PCC/Windows never detects phone.

I think it must need stronger tool to save this phone but I'm worried because I don't know how it got bricked. With this method do you have to reload a backup TA? If TA is good will it get overwrite by s1tool or it leaves TA alone? 

Thanks for the replies! I got this phone from somebody, he said it just doesn't turn on one morning. He never made TA backup that I know of, I don't think he flashed anything and was just running phone as stock from Sony.

If TA is not damaged and I do this s1tool-testpoint procedure will TA become lost? Do you think if phone just stopped working it can be fixed with this method? There is no red LED like I read people say when Xperia ZL is brick.

Thanks, I will try to connect those two points and see if it gets detected.

Since test pin is on back of PCB can I remove motherboard from phone and connect by itself to USB cable? Or does motherboard still need some flex cables from the phone connected?

I don't have backup of this phone though, no TA backup. Will this procedure still work or will there be a problem with the phone after doing this? Lose DRM or not able to load any firmware?

Do you know also how to do SIM unlock for Xperia ZL? Thanks again for help!

Thanks for this thread. I also have Xperia ZL that won't turn on, I am going to try this method now. Does anyone have success fixing their Xperia ZL with this method yet?

Xperia c6502 test points2014-12-20 14.20.02.jpg20141220_141844.jpg

Thanks for finding the points!

So test point are on back side of board. Which of the 4 points you circle are correct testpoint to connect to ground? Any of 4?

Or does picture show you bridge top point to bottom point? One of them is ground connection?