I received a dead iMac G5 yesterday. It is a 2004 17'' model. When I got it, the unit powered on and chimed, but when the backlight came on it flickered and then the iMac died few moments later.
It had one blown cap on the motherboard which I replaced (1800uF 6.3V Rubycon which I replaced for 2200uF 6.3V Matsushita). I also ran an ESR meter through the other caps, but they all checked fine. Also there were multiple blown caps inside the PSU, which I also replaced (I had all of them available, except for 4400uF 6.3V one, for which I used a 3300uF 6.3V one). The PSU is an "EE" type.
Now the computer boots and runs fine, except for the screen which is black. The backlight is on and can also be adjusted via F14/F15. It has a Tiger installed, I then put it to FW Target disk mode and booted off it, and enabled a Remote Desktop access, so then I was able to test the machine, but the screen is still black.
I have checked all the connections, and the LCD is detected in the System Profiler, but it is still black. Also I reseated the memory modules.
I'll try to hook the iMac to the external display, but currently I don't have the right MiniVGA to VGA adapter.
Any thoughts what else to check?
It had one blown cap on the motherboard which I replaced (1800uF 6.3V Rubycon which I replaced for 2200uF 6.3V Matsushita). I also ran an ESR meter through the other caps, but they all checked fine. Also there were multiple blown caps inside the PSU, which I also replaced (I had all of them available, except for 4400uF 6.3V one, for which I used a 3300uF 6.3V one). The PSU is an "EE" type.
Now the computer boots and runs fine, except for the screen which is black. The backlight is on and can also be adjusted via F14/F15. It has a Tiger installed, I then put it to FW Target disk mode and booted off it, and enabled a Remote Desktop access, so then I was able to test the machine, but the screen is still black.
I have checked all the connections, and the LCD is detected in the System Profiler, but it is still black. Also I reseated the memory modules.
I'll try to hook the iMac to the external display, but currently I don't have the right MiniVGA to VGA adapter.
Any thoughts what else to check?