Open Surgery on a Keysight U1461A Insulation Resistance Tester

RE: Open Surgery on a Keysight U1461A Insulation Resistance Tester

Gough Lui — Sun, 11 Jan 2026 11:19:19 GMT

Unfortunately, two-and-a-quarter years later after the change of screens, it seems the replacement screen has decided to go bad. At first, it went to a dim state with several dead pixels like the previous screen did. But then five uses later, the screen has gone completely dark - no image, but the unit is still workable via the Keysight Handheld Meter Logger software over USB/Bluetooth.

Unfortunately, the screens seem to be even rarer and more expensive. It seems replacing it with another OLED screen is just going to result in a few more years before they too succumb. It would likely be a lot of work to adapt it to something else (e.g. an LCD) ... so I guess mine will just have to live black-screen for now. Perhaps I'll need to reverse engineer the interface and do some translation to make it a possibility ... but I suspect that's just more effort than it's worth.

- Gough

RE: Open Surgery on a Keysight U1461A Insulation Resistance Tester

Robert Peter Oakes — Wed, 23 Apr 2025 16:14:40 GMT

Hi there , awesome repair, I am now in the position of doing this myself, only I have 2 Keysight U1461A Insulation Resistance Tester, one failed a while ago and as I had 2 I did not worry about it but now both have filed so I figured it was time to fix them both as there still valuable and good DMM's even with this flaw.

Is the repair holding up?

I have messaged the seller at Alibaba to see if they have it without the tail, it will be interesting to repeat this repair

RE: Open Surgery on a Keysight U1461A Insulation Resistance Tester

DAB — Wed, 27 Sep 2023 20:34:12 GMT

Great teardown and repair.

RE: Open Surgery on a Keysight U1461A Insulation Resistance Tester

scottiebabe — Wed, 27 Sep 2023 12:49:51 GMT

Great work Doctor Gough. DaveJones had an oled fail recently too

I have been lucky, I don't have any test equipment with OLED display, some of my VFD displays may be a touch dim though.

RE: Open Surgery on a Keysight U1461A Insulation Resistance Tester

dougw — Wed, 27 Sep 2023 11:58:09 GMT

Nice job.