Repair Lecroy Waverunner 104MXi

Thread Starter


Joined Feb 11, 2020
I am trying to repair a Lecroy Waverunner 104MXi. The problem is when you plug it in and switch it ON, windows starts booting but then it just turns off. Now if I try to switch the oscilloscope ON again then it does not work until and unplug it and plug it back in again.
I wanted to look at the power supply so I started to open it. I am stuck and not able to figure out how to open it to reach the power supply module. I have attached pictures showing where I have reached up till now.
The problem is that the power supply is on the back side of the scope. And there is no way to open it. I have to get to it from the front by opening and removing what I can. But now I can't seem to get any further. The screws are inaccessible to open the next board. It seems it would have been helpful if I was able to flatten the sides of the case. But they are seem to be stuck to the adjacent sides.

Any suggestions or help would be greatly appreciated.




Joined Oct 28, 2015
Is it out of warranty?
If yes, and it's a few years old, it could be a dried up electrolytic capacitor, probably of small physical size.
Good luck getting it apart.