trs96
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- Joined
- Jul 30, 2012
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- Motherboard
- Gigabyte B460M Aorus Pro
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Did you replace the CMOS battery as recommended ? The CMOS battery in these is likely to have lost it's ability to hold a charge. These Dells are about 5 years old, or more and may have sat on a shelf for two years unplugged from power. My 9020 MT model had a battery like this. I kept getting a black screen at boot up. Was not able to even access the BIOS until I removed the battery for a minute and reseated it. Replaced the CMOS battery with a fresh new one and this quit happening for good. I've had this also happen in numerous 7010/9010 Optiplex models. It's why I made replacement of the battery for everyone a step in my Dell guides.I've pressed F2 to get into the bios and waited and still nothing. Powered on and off the monitor. Will try some other monitors. I know the bios settings quite well now and thank god for the reset RTC pins.
The old batteries may test close to 3.0V but are still not able to hold a charge in my experience. So trying to rule it out with multimeter testing is not the best approach.
It's always a good first troubleshooting step to just replace it and see if the problem goes away. I'm not sure why it happens so frequently with Dell brand Optiplex PCs but it's reported quite often.
https://www.amazon.com/dp/B0002DSVS8/?tag=tonymacx86com-20
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