Hello, I have an iMac G3 Graphite with power on issues. Specifically, when the power button is pressed, there is an "electronic energize" noise briefly from the CRT and the logic board DS9 LED blinks twice then goes dark. There is no boot chime or CRT screen activity.
I stepped through the troubleshooting steps for RAM reseat, SMC reset, PRAM battery voltage check, J9 +5v trickle power check, and DCO voltage check at C4. Trickle power is present with the proper voltages, however the iMac still fails to start up. I checked for obvious signs of component failure (board goo, popped caps, cracked packages, etc...) on the logic board, DC board or CRT board, but didn't see anything.
I want to test the components on the startup circuit/SMC, but I do not know where it is on the board specifically... Is anyone here familiar with this iMac model who can point me in the right direction? Thank you!
model: M5521, DHHS: GX, EMC: 1857 with Logic Board part# 820-1275-A.
I stepped through the troubleshooting steps for RAM reseat, SMC reset, PRAM battery voltage check, J9 +5v trickle power check, and DCO voltage check at C4. Trickle power is present with the proper voltages, however the iMac still fails to start up. I checked for obvious signs of component failure (board goo, popped caps, cracked packages, etc...) on the logic board, DC board or CRT board, but didn't see anything.
I want to test the components on the startup circuit/SMC, but I do not know where it is on the board specifically... Is anyone here familiar with this iMac model who can point me in the right direction? Thank you!
model: M5521, DHHS: GX, EMC: 1857 with Logic Board part# 820-1275-A.