NewHome › Forums › OSSC, OSSC Pro and DExx-vd isl › OSSC – DIY & Repair Support › [STILL AT IT] Think I fried it. Heard a sizzle. › Reply To: [STILL AT IT] Think I fried it. Heard a sizzle.
Replaced the F1 fuse, and the HDMI fuse. There was then a short circuit to ground on DVDD3V3 which is a critical power rail for the FPGA. Found the short circuit by checking for hot spots on the board with my fingers. Found shorts at U5 heat sink pin (the voltage regulator that bumps up against the LCD and is one of the main voltage regulators for everything else). Fixed that short by removing a ton of solder from the heat sink pin.
Another short existed on the SD card ground. Fixed that aswell. Too much solder.
Board boots – LCD light comes on and RED led only.
Tried flashing via JTAG.
100% success on write with v18 of Quartus. Verification fails at 6%.
After flashing – the board comes on but nothing on the LCD.
Making progress.
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