I have a fairly old desktop, which I like to use a fair bit over my newer PC's however sometimes on boot, the CPU fan fails to start. I had this problem previously, and I simply bought a new fan. I have the alarm set in the BIOS menu to warn me if the Fan fails or isn't operating as normal.
I was wondering if it could be the power supply possibly? My current power supply is 300W, which I know is quite low.
Also another thing to note is that it doesn't happen every single boot, however it is getting more and more frequent. To fix it, I generally turn the power switch off at the back and then turn it back on and reboot the computer. And every time I boot my computer I get the alarm for like a second, but I do believe this is normal as it hasn't had the chance to be powered yet.
Is there a fix to this issue?