First try another screen, then another video card. After that, it's time to see if the hard disk and the motherboard are still OK.
PC seemingly will not boot. Graphic Glitch (artefacts)
I use a Dual-Boot (ubuntu 15? and win7)
AMD 6300 FX (overclocked quite a bit, but ran fine)
AMD RADEON 280 by ASUS (or sth. that sounds like it)
When I press the ON button, the PC makes a “beep” noise, Fans and Hard drive spin, all seems fine so far.
But the Monitor (Panasonic TV, connected via DVI-I) shows only artefacts.
A Few times, the PC would boot by default into the linux partition. Once loaded I could use the PC normally without any graphical glitch.
This does not happen anymore (my guess is, it PC will now not boot at all).
When I tried to switch to the WIN7 partition (blindly) the PC did not boot, or at least, did not stop to show artefacts on the Monitor.
Any Ideas how I might solve this issue?