(Topic ID: 212607)
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Quoted from Homepin:It won't be much use fitting a replacement MPU f the existing one isn't being fed the correct (or any) voltage from the supply. The new one would also NOT work just as well as the board that's fitted now.
Yeah I agree and why I asked. If the LED is completely out the MPU is missing 12v at the least.... A new one is not going to get you going.
With just the driver board and rectifier board hooked up check voltages at test points. Start at the rectifier. Then driver. then MPU. Important ones for the MPU is +12v and +5v(driver board takes 12v and makes it into +5v).
Although this is not keeping your MPU from booting up, fix the J1 plug or it will burn up again or accidentally short to something. The red wire spliced in with the orange should go to pin eight. If you look at the Plug Connectors page in the manual pin eight is labeled as a red wire (10 code) and pin 5 is orange (70 code). These are high current GI pins, so you have to spread out the load.
The test points on your rectifier board are next to the LED lights. If your 12v light on the rectifier board is lit up, go to your driver board then and check for +12v there on test point five (TP5).
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