Hooray for Apple Hardware Test

Hi,

I actually thought I'd never be saying this, but hooray for Apple Hardware Test! That's the free utility that Apple ships with all new Macs. I've used it on a number of occasions in the past and, despite several hardware problems, it's never alerted me to a problem. Never. As a result, I've tended to forget about it recently, preferring instead Apple's Mac Test Pro, memtest or Tech Tool Pro if I wasn't sure about the exact fault.

However, the other day I had a 1.33ghz, 15in PowerBook with what looked initially like a hard drive failure. The machine wouldn't boot up at all, nor would it start in target firewire mode. It would boot from the Software restore disc (but Disc Utility failed to repair the disc, and it was impossible to reinstall the OS – the installation would only proceed so far, before the blue screen with the spinning wheel appeared).

Mac Test Pro and Tech Tool Pro both failed to boot the machine!

As a last resort I decided to try Apple Hardware Test (as this is included on the Software restore disc – and this was the only disc capable of booting the machine) and lo and behold, five minutes later the culprit was identified – a faulty RAM module.

A replacement from Crucial (very fast delivery!) is now in place and everything's fine.

Whodathunkit, eh?

Kev.