HeadOnAPike
1 Copper

Re: Optiplex 755 only turns on through power supply button, no video output.

Despite the working power supply test button, I tried replacing the power supply anyway just to see.  Lo and behold, it worked!  That button is a little liar.  However, it appears that SATA ports 0, 1 and 2 are broken, and the BIOS only recognizes SATA3.  So I need a new mobo anyway, on top of the power supply, and a new I/O panel it seems....yikes.

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