PC had been slow and erratic for some time even before upgrading from Win 8.1 to 10. Upgrade from Microsoft. Tried to do a complete restore. Have done this several times before. PC refused with message that recovery file was corrupt. Tried to return to normal Oper. Would not respond. Tried manual shut down and restart. Could here fans and maybe hard drive [not sure] but no power light, no signal to monitor. Took PC to Best Buy Geeks. Other than the same thing I had done, they had no way to test anything but declared it to be a defective mother board [Joshua-H61-uATX, graphics are internal] and would have to go to their facility in Kentucky. With that diagnosis, with no test, my instinct said, "HP has a history". I sent it to Kentucky anyway. Their report was, bad mother board,some other things they were not sure of and would cost $329.00. I refused repair and did some test myself. Nothing to loose now. It is very clean inside. I reset the BIOS and tried it again. The power light came on and it got as far as the first screen on the monitor, a page of system info, but no further. I tried the F1 key and it advanced to the next screen, which it always did, but no further. At that point the keyboard and mouse were dead. It then lost the power light but the fans were running. I again reset the BIOS. The power light came back but the USB ports were all dead and the WiFi as well. Tried both kinds of keyboard & mouse. I then noticed that at each turn on, the hard drive light came on for about 2 seconds with no response, that I could hear, from the hard drive. [ I have several good hard drives to substitute but all older tech & fittings ] Also at turn on the mouse light would flash momentarily. I am, by no means, a computer tech. This is the best info I can provide. At this point the question is , should I spend, as much as $300 on a mother board only to find the hard drive and / or the CPU are bad and how do I know?
Thank you. Any opinions will be greatly appreciated.