How to Troubleshoot a Blown F5001 Fuse on Samsung PN58A650T1FXZA Plasma TV?

It sounds like you're dealing with a tricky issue with the `pn58a650t1fxza`. When a fuse like F5001 blows, it usually indicates that there's an underlying problem in the circuit it protects. In your case, since you've replaced the Y sustain board and the fuse still opens, it's likely that something external to the board is causing the issue. First, it's essential to check the power supply board and ensure that all the capacitors are in good condition—look for any signs of swelling or leaking. Even if they appear fine, it's worth verifying the voltage distribution from the power supply to the Y sustain board. If there's a significant difference in voltage, that could be a red flag. Another thing to consider is the heat generated by the components. When you power on the TV, check which heatsink feels hotter than the others. This can help identify a faulty component, as a defective board often runs hotter due to increased strain. Inspect the various cable connections as well. Look for any burnt or damaged cables, and ensure that all connections are secure and correctly aligned. It's also a good idea to check both sides of the Y sustain fuses for voltage to confirm that the power is reaching them as expected. If everything looks good on the power supply side, you might want to investigate the buffer boards. They can sometimes be related to issues with the Y sustain board and could be causing the fuse to blow. Unfortunately, specific circuit details about F5001 might not be readily available, but generally, it protects the Y sustain board from overcurrent conditions. If you're still having trouble isolating the issue, consider looking for a service manual for a similar model, like the `PN58A550`. These manuals often contain valuable schematics that can help you understand the circuit better.