Try a new CMOS battery, look in manual for a CMOS reset after that. Given the age and design I would not suggest replacing more parts. A replacement PC would be cheaper.
So, when i power the machine on, the fans ramp up, then after around 10-15 seconds i get a continuous low tone for around a minute before it shuts off.
I've taken the CMOS battery out for 30 seconds before re-installing it. After i do this, the computer ramps up i get 2x short beeps and the machine remains on (Does not power off) But still doesn't display anything on the monitor, just a black screen.
I've removed and re-seated the ram,including testing each stick in each slot. - No affect.
I have removed the graphics card and just plugged in to the onboard VGA port on the MOBO.
Probably irrelevant but i had ordered an SSD and replaced the old HDD but these issues all arose prior to that. Any suggestions would be greatly appreciated. Thank you.

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