Th PC is available for about 10 minutes and then the screen starts to get coloured lines on and then the screen appears to close in to the middle and goes black.
Once this happens, then the PC is not usable.
Have had it looked by a HP authorised repairer and they have given the PC back to me saying it needs to have a new mother board. the PC was about 15mths old when I started to have problems with it and given what it cost to buy, I am very very disapointed with this product.
I am going to contact them to see what they response it.
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It's definitely a hardware problem that a software "fix" cannot repair. It sounds most likely a problem with the video processor (GPU) on the motherboard. It might also be a problem with the LCD panel.
that the problem goes away when the pc heats up for a couple minutes would lead me to believe that the problem is a bad connection. in short driver issues and hardware failure rarely if ever fixes itself after 10 min of running, where a loose connection might tighten up as it expands in response to the` heat.
This is caused by burn out of the Nvidia graphics chip on the motherboard. You need a new motherboard. This is due to a design flaw (the subject of a class action against HP in the USA). I have had two motherboards fail on me in this way so far - do not expect any worthwhile support from the HP "support" people they are all in India and can hardly communicate outside of their simple repetative scripts. Its impossible to escape them - I tried communicating with head office but all you get is contact details back to the incomprehensible Indian call centre. I strongly recommend against ever purchasing from HP again.
turn it on and shine a torch onto the screen while it is black. if you can see what is on the screen while doing this you will need to get a new backlight. these are not expensive, around £15. you will need a technician to install it for you though.