Slow to boot,video garbled

[johngulf2020]

My computer has been working fine for the past year. recently my step daughter came to me with her computer to ad a wireless card to it. I unpluged my monitor, mouse, and keyboardto configure her computer. When I plugged everthing back into my computer thats when I began having troubles. First It's slow to boot up , then the video is all garbled. I replaced the hdmi cable (didn't Work),Then I replacer the video card ,I still get the same Garbled signal. This last time I booted the machine I got A checksum error message. I built this machine myself. Asus rampage mobo, 2 gigs ram, q6600 cpu ,1000w ultra ps,and an ati 4870 video card. signed clueless

 

[Outlander_04]

when is the video garbed?


It is also garbled if you enter BIOS ?

 

[johngulf2020]

Yes, video is still gabbled. I reformatted the hard drive and reinstalled everything yesterday. system is still slow to boot and video garbled when play flight sim. I have to warm boot several times to get machine to bring up the video.