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JDLang76

macrumors regular
Original poster
Jan 1, 2018
155
57
Computer -
27" Mid-2011 3.4ghz Radeon HD 6970m 2gb 32gb OWC RAM

Has worked flawlessly since I bought it new in 2011. Just retired it as my personal computer. Went to wipe it to sell it and now I'm having issues.

The Problem -
When I push power button, I get 1 of 2 behaviors.
1 - 1st LED is on when plugged in but disappears and I get nothing
2 - Posts as normal then turns off before Boot Menu can load
As time goes on, Behavior 1 is occurring much more frequently.

Tried Solutions -
Replace PSU
Replace Logic Board
Replace PSU cable
Replace EMI filter
Replace Video Board
Rule out each stick of RAM
Rule out CPU and GPU
Different outlets
Replace Power Button

Im at a loss. I've basically replaced the whole computer or ruled everything out. (I had a spare model lying around with known working parts)

Any ideas?
 
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