Hi all,
I have an old HP 54111D scope which spits out an error message once its done going through all the self test loops. There is a message in red letters on the screen saying Input Overload, and also power up self test failed.
All of the controls are frozen and no menus can be accessed. I looked inside and no visible physical problems are present. Checked all the cables between various modules and they seem to be fine. Did continuity check on some of them and they all worked.
If anyone has any bright ideas on where to go from here I would be very grateful.
Its a big piece of hardware, but I really like it and I want to try and bring it back to life
Thank you!
Cheers
I have an old HP 54111D scope which spits out an error message once its done going through all the self test loops. There is a message in red letters on the screen saying Input Overload, and also power up self test failed.
All of the controls are frozen and no menus can be accessed. I looked inside and no visible physical problems are present. Checked all the cables between various modules and they seem to be fine. Did continuity check on some of them and they all worked.
If anyone has any bright ideas on where to go from here I would be very grateful.
Its a big piece of hardware, but I really like it and I want to try and bring it back to life
Thank you!
Cheers
I used to work on those big pieces of hardware. They are nice scopes so I don’t blame you trying to get it to come back to life.
This issue to me sounds like there is a problem with one of the input attenuators. So knowing that there is not going to be a replacement I hope it’s a cable problem on it and it’s not defective.
This is what I would do. Each of the fur channels and the same. I would start by lifting up the Channel ! vertical board just enough ( one inch ) to get it out of the motherboard that is connecting them all together. Then power up the scope and see if it is still locked up. If it is put channel one back and then go to the next vertical channel two and so on………
You can pull all of the boards out of the below motherboard and inspect for a bent pint this will most definitely cause a lock up issue.
With just the board that has the battery ( called the I/O board and the CPU and the display boards the scope should power up and menus are accessible.
I hope this help!
marowley