Apple is offering cash payments to customers still having grief with their 27-inch iMacs, which have been plagued with various screen problems.

In the UK there are no 27-inch LCDs screens available to fix the iMacs so instead Apple is offering full refunds plus 15 per cent, Gizmodo reports.

Some of the machines have suffered from flickering screens, now fixable with a firmware update. But others have developed a strange yellow tint on the screens.

Despite the saga of problems Apple claims the current shortages are not due to stopped production but the overwhelming popularity of the machines.

A UK reseller told the site there was a backlog of 230 orders for the unavailable screens with no date for expected delivery.

This is the latest in a long line of glitches for the top desktop model - early versions refused to boot up and suffered from cracked cases.

The machine is still listed as available on Apple's UK online store - but with a shipping date of three weeks. ®

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