ironborn65
Well-known member
Hi folks,
before posting here seeking for help I read and checked the material I found here and elsewhere.
So; I got a CC that does not boot up.
The logic board is very nice and clear, but as usual I recapped it with tantalum caps.
The analog board seems just fine with no evident leaking but I recapped all the caps in the high and low power section as in the attached pic.
I removed and tested ok the optocouplers, they went back in with a socket.
I replaced both the TDA4605-2, I don't know how to test them. I tried the -3 as well. (I added a socket)
I replaced both the IRFBC40, they test OK though.
The fuse is ok.
Both boards inserted, grounded, keyboard, mouse, 3V battery, RAM, VRAM.
I power it up and press the start-button, no chime, no spinning HD, no fan.
No +V at the HD molex.
If I bench test the analog board with only the AV plug I do not measure any voltage in the fan contact nor in the connector as shown below.
My frustration level is very high, I'm considering collecting brooms, they always work.
I can measure 220V AC in the input of the bridge rectifier and 330 DC in the output, so it seems just fine at that point.
At the end of the transformer I got 0 V.
I do not have an oscilloscope but I wound't know how to use it in any case.
Anything I'm missing or doing wrong?
before posting here seeking for help I read and checked the material I found here and elsewhere.
So; I got a CC that does not boot up.
The logic board is very nice and clear, but as usual I recapped it with tantalum caps.
The analog board seems just fine with no evident leaking but I recapped all the caps in the high and low power section as in the attached pic.
I removed and tested ok the optocouplers, they went back in with a socket.
I replaced both the TDA4605-2, I don't know how to test them. I tried the -3 as well. (I added a socket)
I replaced both the IRFBC40, they test OK though.
The fuse is ok.
Both boards inserted, grounded, keyboard, mouse, 3V battery, RAM, VRAM.
I power it up and press the start-button, no chime, no spinning HD, no fan.
No +V at the HD molex.
If I bench test the analog board with only the AV plug I do not measure any voltage in the fan contact nor in the connector as shown below.
My frustration level is very high, I'm considering collecting brooms, they always work.
I can measure 220V AC in the input of the bridge rectifier and 330 DC in the output, so it seems just fine at that point.
At the end of the transformer I got 0 V.
I do not have an oscilloscope but I wound't know how to use it in any case.
Anything I'm missing or doing wrong?