I recently recapped 2x Color Classic logic boards. One of them works well and turns on immediately from the keyboard, with new Pram battery installed.
The other one remains dead, tested in the same machine.
I measure around 3.5 volts on the ADB ports, so it gets power from the Pram battery, still refuses to come to life. I re-checked all the replaced capacitors and everything is fine, no shorts, broken traces or faulty caps ( ESR tests are fine ). I also cleaned the contacts where it meets the wiring harnass.
Both boards were non-working before I recapped them, however why does one come to life and the other not ?
The zero visible damage to the PCB of the non-working board.
I already tried the trick of sliding the board quickly in and out with the power switch on to no avail. As soon as it slides out, the classic powers on and hard drive starts spinning, but when sliding it back in fast doesn't help. The screen is gray, HDD keeps running, when you power it off, it's dead again, no start from keyboard.
Leaving it in the Classic for 24 hours with power switch on also doesn't work.
The Analog board of the color classic is also completely recapped so we can rule out this as well.
Any idea's to solve this ?
The other one remains dead, tested in the same machine.
I measure around 3.5 volts on the ADB ports, so it gets power from the Pram battery, still refuses to come to life. I re-checked all the replaced capacitors and everything is fine, no shorts, broken traces or faulty caps ( ESR tests are fine ). I also cleaned the contacts where it meets the wiring harnass.
Both boards were non-working before I recapped them, however why does one come to life and the other not ?
The zero visible damage to the PCB of the non-working board.
I already tried the trick of sliding the board quickly in and out with the power switch on to no avail. As soon as it slides out, the classic powers on and hard drive starts spinning, but when sliding it back in fast doesn't help. The screen is gray, HDD keeps running, when you power it off, it's dead again, no start from keyboard.
Leaving it in the Classic for 24 hours with power switch on also doesn't work.
The Analog board of the color classic is also completely recapped so we can rule out this as well.
Any idea's to solve this ?