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3 Posts
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939
October 16th, 2022 15:00
aux_pwr on, pc does not power on.
I have an Optiplex 160 that I disassembled for a drive replacement, I also took off the heat sink for both the CPU and the GPU. After I reassembled everything, I plugged it in and pressing the power button no longer worked, but the aux_pwr led was green. What can I do other than replace the motherboard?
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redxps630
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October 16th, 2022 21:00
In this very old model, first replace cmos battery with a new cr2032, then clear cmos settings by motherboard RTCRST jumper.
service manual: https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-160_service%20manual_en-us.pdf
TFCypher
3 Posts
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October 19th, 2022 16:00
wouldn't the machine be able to boot without the CMOS battery? I've also tried clearing the RTCRST jumper, but that hasn't worked.
redxps630
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October 19th, 2022 16:00
The cmos battery just keeps cmos settings nonvolatile when power is off. If you remove cmos battery and drain off flea power, cmos goes to default settings.
this old model is not worth replacing motherboard. If you remove all memory does it power on and beep? No beep is a bad sign.
TFCypher
3 Posts
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October 19th, 2022 21:00
it doesn't power on at all. No beep, no light on the power button. Only the light on the aux_pwr.
I don't think taking off the heat sinks could have caused this. It was working before. I don't know what I messed up.
redxps630
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October 20th, 2022 10:00
Sometimes old mobo just goes bad without explanation what happened. I changed heatsink of an old XPS that was working a few weeks back. Then it failed post completely. I could not bring it back to life. Consider these elderly cards which are very poor in health. Not your fault if it died.