Hallo Philip, > I have measured the voltages on the motherboard... More important is the voltage at the input of the 7805 voltage regulators. IIRC that should be about 9 Volts. If that is near zero as well, it could be there is a shortage, or the transformer is dead. Check the top right of schematic http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/pet/2001/320008- 2.gif Disconnect the power connector and check the AC voltage between pin 1 & 4 and 5 & 4. IIRC should be about 12 volts AC. Now you can check the diodes. If all is OK so far, desolder the inputs of the 7805's and connect a 21 Watt 12V lightbulb. Should burn without any problem. If no problem so far, connect the pins of the 7805's one by one. Keep us informed. -- ___ / __|__ / / |_/ Groetjes, Ruud Baltissen \ \__|_\ \___| http://Ruud.C64.org Message was sent through the cbm-hackers mailing listReceived on 2009-07-28 19:21:37
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