QUESTION I bought a Club 3D ATI Radeon HD 5750 graphics card, but my motherboard doesn't recognise it. When I plug the monitor cable into the graphics card, the screen goes blank; when I put the monitor cable back into the onboard graphics card slot, the screen is fine. Ted

HELPROOM ANSWER Your graphics card will need to be attached to the PSU. Turn off the PC, disconnect it from the mains and earth yourself.

Locate the six-pin socket at the back of the graphics card and plug in the corresponding connector from your PSU. You may have to buy a new PSU if this isn't present.

If the card still doesn't work and the fan isn't spinning, it may be broken. You should be able to replace your graphics card under warranty.

See also: How to fix everything: the ultimate guide to fixing technology

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