@Andone Unfortunately it's not under waranty for a long time ( I bought it from second hand). So I was hoping you can help me to repair it. The seller said me it was working but it's not and I didn't...

Hi everyone ! I've a problem with my managed switch (TL-SG2452) While running, the power led is green and the fans are turning. But the sys led is always off as well as all the activity led (on every...