overclock failure/no video signal

Hello all i have asus desktop pc windows 10 amd a6-3620 cpu, ASUSTeK CM1740 motherboard.The last few days the pc boots up with no video signal or beeps to indicate an error, after a few trys of rebooting multiple times the screen finally comes on displaying a overclock failure please press f1 to configure your system. I have not overclocked this system and was wondering what could be causing this any help is appreciated thank you. The keyboard also does not work on boot up if that may help in any way not sure?

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Clarification Request
So F1 is not working?

You should try the BIOS/CMOS reset. But the CM1740 appears to be a desktop, not a motherboard. for example.

There are a handful of that desktop model so I'll try to find the one. How about this one?
"ASUS Desktop PC CM1740-US-2AF A6-Series APU A6-3620"

Unfortunately Asus USA seems to not have this one on file.
This looks to be a desktop from 2012 so let's wing it.

From what I can tell they used this board:

Manual is at
I clipped the page at

This can also occur if the owner isn't cleaning the fans and inside on a regular basis.

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Thanks for reply

Thank you for the reply the f1 does work and allows me to enter the bios i reset it to defaults settings and double checked to make sure the system was not overclocked.Then it happens again the following morning. Also i have never touched the jumper pins they are on pins 1-3.

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That helps. To me this tells me

It's time to replace the CMOS battery. It's old enough. Cheap too. I pay a buck on but buy in bulk.

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