Monitor, Mouse, & Keyboard Not Working

[Olivia12]

My PC has MSI A75MA-G55 Motherboard. When it boots, there is no display & the keyboard & mouse do not work. There are 2 beeps indicating Parity Error. I have tried everything I know & what I have learned online.

Any & all help will be greatly appreciated.

 

[Grizzly]

What did you try as of yet?? Looks like memory error to me so you might want to try one module at a time...

 

[Olivia12]

First round of trying to fix it, I disconnected the RAM & ASUS Radeon HD 7750 1GB Video Card, cleared CMOS Jumper, removed CMOS battery & installed another one.

Next, I removed the DDR3 Ram & tried one at a time, unhooked CPU from MOBO & reconnected, removed Asus video card, cleared CMOS, & disconnected SSD & Harddrive.

I had some more Ram that I installed in place of the original & replaced the battery a second time. Still no luck.

MSI A75MA-G55 Motherboard

 

[Bighorn]

Looking at the image of that motherboard at https://www.amazon.com/MSI-A75MA-G5...=2025&creative=165953&creativeASIN=B0058M3RNW shows it has onboard VGA display port. I'd remove the add-in card and try the built-in. If still no display of data there is no way of knowing if the keyboard and mouse are working. It could be a bad motherboard.

 

[Olivia12]

Thank you for the info. At this point, I can't imagine what I haven't tried. It just won't work.

 

[BigFeet]

I second Bighorn's assessment that you may have a bad motherboard.

 

[Olivia12]

I second Bighorn's assessment that you may have a bad motherboard.

I second Bighorn's assessment that you may have a bad motherboard.

Is there a method to confirm the MOBO is bad before I replace it? I have always kept the PC, printer, monitor, speakers, & Wi-Fi connected to a Cyber Power 1200AVR. If it fried, I would like to what happened. THANKS!!

 

[Grizzly]

If I consider everything you have done so far and the MB is still beeping, tells me that your MB can't go past the P.O.S.T (power on self test). That means that most likely the BIOS has become corrupt as it is a miniature OS in itself. A hardware problem with the memory controller cannot be ruled out either. Sorry to say but I have to agree with the assessment that you may have a MB gone bad....

 

[BigFeet]

Really, the only way to confirm the motherboard is bad is to rule everything else out. You've pretty much ruled everything else out except the motherboard and CPU. And it's extremely rare for a CPU to go bad unless you are overclocking it beyond it's limits.

 

[clifford_cooley]

Are you certain the power supply is still good?

 

[Wolfie]

I would grab a copy of Linux ( https://distrowatch.com/ ) and try that as well, it might prove something if you cannot boot at all!.

Ubuntu or PCLinuxOS are good choices!.