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I have an a1708 that came to me after a screen replacement. Works fine in safe mode but in regular mode it loses image at the login prompt, just a few seconds after showing prompt. Image will return sometimes after pressing a few keys, then go right back out. Backlight is on entire time, I have...

Never mind guys, My board ends with a 02, not an A. That's the issue.

I got the files from a different forum. Same behavior from both.

I overwrote the original bios with a file from internet without backing it up. Stupid move, I knew better but was being lazy. Serial number is c02qq24pgg78 I have files I have tried with a clear ME, they don't work. This site is telling me the file I am uploading is too large so here is a...

I have an 820-00431-a that wont boot macos after cleaning icloud from firmware. Will boot fine on a windows install but on macos it locks at loading bar. I tried several different bins from various places, cleared pram every time, same issue. I made the mistake of not clearing the original file...

Q7180 it was. Now that I flipped it over I can see it was leaking. Thanks!

Yep, been doing that on mac boards since 2006 on issues like this, never had a problem, and has always been a helpful diagnostic tool. I make sure the voltage matches precisely and put a low current limit on the bench supply in case something goes wrong it wont burn anything. I am aware of...

I have a 820-4924 that came in with a blown f7005 I replaced the fuse and now have a green light that flashes on once every few seconds. Power is cycling at f7005 so power is cycling everywhere else, something is sending a signal to shut down power supply. I have checked for shorts everywhere...

Has anyone been successful in rewriting the firmware on these?

Thanks for your reply. What exactly do you mean by code termination? The last few digits after the part number?

I have a 820-00281 that had no 20v, only 5v from the charger and that was cycling. No pp3v3_g3h but no short on that line. Found short to ground on c3105 Removed u3100, now short on 3105 is gone and pp3v3_g3h is normal but still no 20v on any of the ports. I am not familiar with how this board...