[FIXED] Broken text display on TEK 2465B

[thenewservant]

Hey guys,

I've recently picked up a TEK 2465B from ebay. The seller warned that the only defect was a dead channel 1, which I was fine with.

After booting it up, "DIAGNSTICS" etc showed up, as in any picture of the scope you could find. Five minutes later, the displayed text started to go weird and buggy, it seems broken, as shown on the two photographs. Channels 2,3 and 4, and basically every other aspect of the scope seems fine.

Do you guys think that could be a faulty cap problem? considering I did see it work then fail. Or could it be a dead ASIC?

[thenewservant]

Well folks, seems like a temporary bug, since the display worked back again as if nothing happened, and this, without me knowing how or why.

What I did was opening it up, looking at the big SMD-THT chips' battle inside (which is kind of weird imo), nothing more.

[jmelson]

The computer that runs the front panel and on-screen display is connected by a BUNCH of stacking connector pins and ribbon cables.  When I had flaky problems with mine, I reseated all these connections, and it went back to working fine.  Just opening the case could jostle the boards enough to temporarily fix it.

Jon