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check mainly the VPPU and VDDU transistor connections. Carefully check the BC547 and BC557 transistors and its terminals.
Did u do step 3 which is HID detection?What is the voltage getting at VDDU and VPPU??
Yeah, u can program the PIC18F2550 using arduino,But I am not yet tried yet. try this tutorial : https://sites.google.com/site/thehighspark/arduino-pic18f
You can try to program PIC18F2550 using arduino from this tutorial, I am not tried yet. Comment me if it is working.https://sites.google.com/site/thehighspark/arduino-pic18f
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