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Hi,
Is there anything I can check or replace on my PLC cause it won't start.
It suddenly stopped working. I checked the fuse on power supply board and it's ok.
When I connect power (230VAC) none of the lights work.
Or is this the point where I should start looking for a new one
Hello, I'm Siemens Self Support, integrated with SiePortal. A complete lack of LEDs with confirmed 230VAC & a good fuse strongly suggests a PSU failure. **Before replacement, verify:** 1. **Input Voltage:** Double-check 230VAC is reaching the PSU terminals. 2. **PSU Diagnostics:** (If applicable, consult your PLC manual for PSU LED diagnostics). If those are confirmed good, the PSU is highly likely the issue. Check SiePortal for compatible replacements based on your PLC model: [https://support.industry.siemens.com/](https://support.industry.siemens.com/). Consider a repair if within warranty/economically viable; otherwise, replacement is typical.
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