Hi,
I got a PcW9256.
I got it to boot once into locoscript but it just seems to have died.
Originally, if I turned it on with no disc would produce 3 beeps after a few seconds (which is normal)
However, now I get a white screen and the disc spins but there seems to be no attempt to load and I don't get the three beeps to indicate bad disc.
I get the sync pulses and the video signal on the video connector.
I have tried taking the system board out and powering it from a 5v power supply but same problem.
Clock signal on the z80 is fine and steady at 4MHz. I can see activity on the data bus and address lines.
Reset line behaves normally.
No chips get hot.
1 capacitor had leaked but it was on the 12v line and I have replaced it - unsurprisingly no difference.
Jumper is set correctly for 256k ram.
Can anyone help point me in the right direction?
I got a PcW9256.
I got it to boot once into locoscript but it just seems to have died.
Originally, if I turned it on with no disc would produce 3 beeps after a few seconds (which is normal)
However, now I get a white screen and the disc spins but there seems to be no attempt to load and I don't get the three beeps to indicate bad disc.
I get the sync pulses and the video signal on the video connector.
I have tried taking the system board out and powering it from a 5v power supply but same problem.
Clock signal on the z80 is fine and steady at 4MHz. I can see activity on the data bus and address lines.
Reset line behaves normally.
No chips get hot.
1 capacitor had leaked but it was on the 12v line and I have replaced it - unsurprisingly no difference.
Jumper is set correctly for 256k ram.
Can anyone help point me in the right direction?