HP mother board question

[dkindone]

First problem is I have an HP from walmart, extended warranty ran out June 2016. I have posted in HP support, yesterday at noon. No help so far from HP tech forum so far.
monitor says: VGA not connected DVI not connected , so i go get a different VGA cable, same thing happens. Bring a different monitor and same thing. Both monitor and cable are fine on a different computer.
guessing video graphics card? Open case to see if I can replace graphics card, but pretty sure its integrated into mother board. HP/APXD1-DM (RedwoodB) SSID:ZAE4

Can I buy a replacement mother board or upgrade the mother board with out upgrading any other hard ware? If so, where can I buy and get support?

Or should i just buy a different computer?

 

[maikutech]

If this is your computer as shown, no you can't its a btx standard case some computer manufacturers use.
https://cnet2.cbsistatic.com/img/WSjtncE8tnASDT7f0MNtsbCKkHA=/830x467/2010/08/03/067790c9-67c4-11e3-a665-14feb5ca9861/33968314-2-1333-OVI-4.jpg

I would suggest building your own computer if you are computer savvy enough or have someone locally who will build one at a fair price.
https://www.amazon.com/Acer-Desktop-i5-7400-Windows-TC-780-AMZKi5/dp/B01N5SXZY8/ref=sr_1_1?s=pc&ie=UTF8&qid=1493830949&sr=1-1&keywords=desktop+computers&refinements=p_computer_cpu_speed-bin%3A3+GHz+%26+Up

If you don't like those 2 options, then this pc or shopping online will be your last best bet.