IMac 233 startup requires "warmup"

After several years of dependable service my
IMac began to require a "warm-up" period before
it would actually startup.

By this I mean that pushing the power "ON" button
causes the power button to light amber. The fan
comes on. Then one relay click followed by a
second click happens and then no change. The
light stays amber with no other sight or sound
regardless of how long the IMac is left on.

If after some time, perhaps 20 minuets, I push the
reset button with a paperclip or alternately pull the
power cord and reconnect and then press the
power button the IMac cycles on normally.

I have tried the following: changed the battery,
disconnected all external cables, tried a CD
startup disc, reset the pram, reseated all
connectors on the cpu board and reseated the
memory.

I suspect that there is some sort of thermal issue
with the power supply board. Saying this does
not make it true. I am very open to those wiser in
the ways of Imacs than I am.

Replies gratefully accepted.

Bob Swezey
3/12/03
rwswezey@aol.com

Your analysis of power problems is probably spot-on. For the electronically skilled, it may be a simple fix, but for most people, a replacement analogue board is the only practical solution.

p