820-3787 CPU FETs, what are the number of the pieces to replace

[nelo1012]

820-3787 replace the CPU FETs, can you guys tell me which are the ones that i have to replace

i have this 820-3787 that has random shutoffs, been reading and duke had posted that was the issue,

 

[2informaticos]

Replace U7310/20/30 with REAL new FDMF6708.
Buy them from reliable online store, not from chinese.

 

[SMMRepair]

TCRS, are you using FDM6708s or 6808s? Replacing only the power supplies or controller as well? The way we test is to let the unit sleep overnight (6+ hours). If CPU is damaged/bad, it usually either won't wake from sleep (most common--LCD stays black, etc), or will wake/crash instantly. I've tried editing the hibernate function via terminal to have it go straight into hibernate (so we could speed up testing, etc), but it didn't work the same. The overnight sleep seems to be about 98% effective in catching the duds. Confident in the soldering, no issues there, but a significant percent of the boards end up having the same issue within a few months. We use new 6708s. For what it's worth, I've heard the same (repair doesn't seem to take or last in many cases) from a few other repair shops. Curious if you're lucky (lol) or if there's something we're missing.

If you're interested, I have around ~50 3662/3787/00138/00163/00426 boards with reported issues that all sound like vcore dropout. If you'd like to purchase them, shoot me a message. None tampered with or attempted-repair.

 

[TCRScircuit]

6708 of course.

Havent tried that hibernate deal. Will on the next ones i get.