So I am trying to set up a home theater computer. As part of that I ordered (off ebay) an Optiplex 790 with i5 and 8 of ram running Windows 10 pro. I added a NVidia 1030 card and also 4TB HD. It came with a 180GB SSD and 500GB HD. I left the 180 SSD attached. Prior to changing out parts, I never tested the computer as I did not have a monitor at my home (have been using only laptops for the longest time).
Anyhow, I ordered a monitor, as also in process of setting up my wife's office. I got the monitor and connected the computer today and the monitor says no signal. I tried the DVI and VGA connection as well as the HDMI from the video card. I have another Optiplex i had ordered from ebay around the same time and it worked fine through the DVI.
I took out the hard drive I added and connected the old one. I also removed the video card. Still no signal. I disconnected the DVD and still no signal to monitor. The computer turns on and the HD spins. I even tried taking the HD from the other optiplex and using that, but still the monitor does not get signal.
Any suggestions to troubleshoot? I am hoping it is not the GPU. I did email the seller on ebay. He said it all worked when he mailed it out and he has 100% rating. He suggested to disconnect the battery supply and hold down power button for 10 seconds to somehow empty capacitors or something then reconnect battery supply. I am at work tonight but plan to try that in the morning. Any further suggestions on what I can do to try to troubleshoot the problem? How do i figure out the issue?
Of note, I am not hugely computer literate, so that complicates issues
Anyhow, thanks for your time and help!