pc will not boot need urgent advice please

windows7 ultimate 32 bit. suddenly switched off, reboot does not show on screen which reads "HDMI CHECK SIGNAL CABLE"

Using ATI HD4350 fanless with heatsink connected via HDMI lead. tried another monitor using white dvi cable monitor stays blank then shows power saving mode. so that eliminates the monitere & hdmi lead.

could a duff graphics card show this error? any advice please. no on board graphics.

unable to get in to bios no bleeps, win7 dvd no good either, all fans come on and moterboard MSI X58 on board indicator light goes from amber to green when pc turn on so m/b must be ok.

If you can't get the system to boot up it's difficult to know whether to go for the graphics card or the motherboard.

When you say the Windows DVD is no good, is that you don't have one or that you can't extend the DVD drive tray?

If you've got a problem with your graphics and your DVD drive you could have a motherboard problem or possibly a power supply problem.

Do you have a system repair disc?

Have you tried booting into Safe Mode?

the dvd tray will open and close ok, put w7 dvd to boot but no joy cannot get anythink on the screen, m/b green light comes on [msi x58] so i presume that shows its ok, all fans work [graphics card is fanless has heatsink which was not hot]

tried a 2nd moniter with a dvi lead still nothing on screen,

cannot get into bios let alone safemode just got black screen telling me to check cable signal which i think might be a duff graphics, would a dead graphics give these sympoms

got no spares. cannot afford both a graphics and a psu which seems most likely?

present psu is a ocz700w and graphics ATI HD4359

the card does not have a power connection, do not have a multimeter, at astandstill at present run out of ideas

Your best bet it would seem is to take your computer to your local computer repair shop or someone who has the equipment to check your power supply and suchlike.