Intel D945GTP motherboard no post no beep

[retiredcaps]

My friend's Intel D945GTP socket 775 motherboard had the misfortune of being powered by an Antec SP-350 with Fuhjyuu caps. He said the power supply squealed for a couple of months, but the computer worked until recently.

By the time I got it, it won't post or beep. When I measured the 5V SB rail, it was 11V DC. I opened up the power supply and found 2 bloated 1000uF 10V caps on the 5V SB rail. I also changed out the 22uF 50V and the squealing stopped.

Now that the power supply works, but the D945GTP won't post.

Symptoms
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- no beeps
- no display
- no POST

Tests done so far
==========

Here is what I have tested so far and found. All resulted in no beeps and no POST.

- all tests done below with the motherboard "bread boarded" (that is, out of the case sitting on a cardboard box)
- installed new 3V battery (measures 3.33V DC on multimeter)
- cleared CMOS battery by removing it for a hour and tried moving the clear CMOS jumper
- tried to reflash BIOS by removing jumper and following Intel BIOS recovery instructions
- all voltages on PSU are within spec
- cannot turn the board on and off by shorting out the power sw pins (need to jumper green and black)
- all voltages on the motherboard around the CPU, southbridge, and northbridge appear normal (1.3V around vcore, 1.8V DC around DIMM)
- installed known working CPU
- installed known working Kingston 512MB DDR2 memory
- tried one DIMM in slot 1 and then slot 2 and get no beep
- tried removing all DDR memory and I still get no beep
- tried known working video adapter

Questions
======

1) Is the southbridge fried because I can't turn on board by shorting out the power sw pins?
2) What parts of the motherboard might be fried due to the 11V DC on the 5V standby rail?

[retiredcaps]

Re: Intel D945GTP motherboard no post no beep

Forgot to add that the 2 led post card I have shows nothing on the display other than the lights on for voltage (3.3, 5.0, and 12.0V DC).