820-3437 A1466 Missing PP1V2_S3

tlough75

Member
Hi, I have another 820-3437 board. When I first started working on it it would draw .025A and then go up to .115A or so. I found that I am missing PP1V2_S3. I traced it back to U7400 so I removed it and replaced with a donor U7400. Board fires up, draws about 800mA and has a three beep pattern. Not sure of where to go from here
 

2informaticos

Administrator
Staff member
3 beeps means RAM, or CPU issue.
As you found a problem on the power rail of both, possibly overvoltage could damage the CPU-RAM data bus.

You can try to reflow RAM chips and maybe CPU; pray a lot too...
 
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