820-4924 Another brain dead board

overshoot

Member
ok, I got that board from eBay (maybe the seller is from this forum, who knows... ;-) ) Looked too good to be true.
Anyhow, it looked mint on the auction pictures and it does also under the microscope. Only one resistor was detached but I did re-attached it (maybe during transport)

CPU_VCore is present.
Board draws nearly an amp, but often .8amp and CPU is burning hot. It is supposed to be a Core i7 so I am wondering if it is normal?!
Resistance to ground on Vcore is 8ohms which seems ok for an i7.

On 20 times, I did try to start it, I got no life out of it, only once on an external display using Thunderbolt (which gave me hope)
But since then, nothing.
It won't chime, USB mouse lights up.

I am thinking this board might have been smashed somehow (some CPU balls could be detached) or CPU is giving up.
I did try a different Bios but same thing.
Board looks like it has never been reworked. Only that small resistor... when I saw it, I thought "easy win"... hahaha

Any idea on what else to check?
 

2informaticos

Administrator
Staff member
First of all, tell us which resistor are you talking about.
Use pendrive OSX with LED Link; if flashes, that confirms USB activity 100%.
Try few PRAM reset, just in case.

You can also try new BIOS, just in case...
 

overshoot

Member
Resistor was R7279 near U7200.
USB adaptor just gets power, no blinking whatsoever.

PRAM reset won't work, no chime, USB light stays on.

I've just did try a clean ME bios found on the forum board with no difference.
 
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