Date: Thu, 5 May 2005 10:34:11 +0100 (BST) From: Daniel Price <[EMAIL PROTECTED]> Subject: [1st] Radius 81/110 (8100) Troubleshooting
I have a Radius 81/110 clone (basically an 8100/110 in another box) which suddenly died. It was working fine one day and when I switched it on the next, it failed to start up. All the drives were powered up as normal; the PRAM battery was fine, even the little power light on the front of the box was lit. But there was no start-up chime and every indication that the motherboard was dead.
Pull the motherboard. Remove the heat sink. Clean the CPU chip (gently) with rubbing alcohol to get the white heat sink compound off.
Now hold the board at an oblique angle to a light source and check for cracks in the ceramic area of the CPU around the metal die in the middle. A not uncommon failure mode for the x100 series is for the 601 CPU to simply crack.
If you don't see any cracks, then clean the heat sink compound off of the heat sink as well, reapply new heat sink compound (available from Radio Shack in a little blue & white tube for about $2) and hope that your problem was overheating and that the fresh heat sink compound will solve it.
While you've got the MB out, blow the ROM slot out with compressed air and maybe clean the pins gently with a folded bit of file card or some such and more alcohol.
The ROM slot and cache slot are interchangeable, so you might try putting the ROM module in the cache slot and leaving out all the RAM and the cache and see if that helps. If the machine chimes, you may not be able to boot with only the 8 MB on the MB, but at least you'll have narrowed down your problem.
Jeff Walther
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