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September 11th, 2018 12:00
T3500 won't post or boot
I recently turned on my T3500 the other day and surprisingly it wouldn't boot up. When I press the power button, it powers on for 1-2secs. then turns off. It repeats this cycle and the only way to stop it is to unplug the power cable.
It doesn't stay on long enough to get an error beep or a diagnostic code. Here's are the things I've tried so far.
- unplugged power supply cable to m/b, cdrom drive, hdd's
- removed vid card & ram
- removed all dust bunnies with compressed air
- sprayed contact cleaner on all contacts
- tested the power supply
- removed m/b battery and reset CMOS
- reinstalled power cable and inserted 1 ram stick to test
And nothing...power cycles on & off every second or 2 as per original issue, LED on mobo is on. I really hope the mobo isn't fried.
grysql
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September 11th, 2018 20:00
How did you 'test' the PSU? What color is the PSU LED, it should be green.
Are there any Beep Codes when it is attempting Boot?
Have you tried a NVRAM Reset on the Mobo? (Page 15-16 in the T3500 Service Manual)
NVRAM Reset Jumper
RTCRST - Clears NVRAM. The NVRAM will be cleared when the jumper is closed (use the jumper from the password bridge). To properly clear; AC power must be applied (not necessarily turned on) to the system for about 10 seconds while the jumper is closed.
Pins 1-2 shorted clears NVRAM
The picture below shows the location of the configuration jumpers on the system board.
NOTE: You can use the RTCRST jumper procedure above to attempt recovery from a No POST, No Video situation.