TEX TDS320 cannot power up

[Gibchen]

hi, everybody

My TDS 320 suddenly shut down yesterday during the test.
when I push the on/standby button, nothing happen except the relay is clicking.
Dose anybody has the same issue before?

or any idea to start troubleshooting?
by the way, the fuse is fine.

thanks

[lowimpedance]

Not my own experience but I know someone who had a similar issue with their 320, which of course turned out to be the good old electro's in the power supply gone dry.
That would be the first thing to do/ check / replace etc.

[Pat Pending]

Similar problem with a TDS410A due to PSU 110/220 voltage detect failure.

In my case a smallish electrolytic was basking in the heat rising from a high wattage resistor directly below it. (PSU is mounted on its side). YMMV
This was located in region of the PSU towards the scope rear.

I should have left the leads of the replacement cap long and bent it away from the heat source.