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A though I had if anyone wishes to correct me or add to this, maybe there is a problem with the 5.2V regulator attempting to run to high where the crowbar is trying to prevent this thus loading the

Fixing to do that ! I only paid $75 for the board and since the FW proms are ok I am almost tempted to keep it for the chips Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows

Part of the problem was that the cathode of a selenium rectifier was marked with a + sign to signify that it was the positive output of the rectifier system.? Of course that was the cathode.? So

Hopefully you can return the CPU to the seller ! While you were at it, did you try the 8510/8516 using the CPU from the lab in your 8341??? Cheers! Bruce Quoting Lothar baier

Thanks, Matt. I think you may be right as it would explain a lot if it were just a case of component value drift over time needing correction. I may be able to squeeze in a fresh test on the 10Mhz OUT

Good, so it sounds like your reference is fine. I would redo the test on the 10 MHz OUT next. If you still see that harmonic, it will narrow down at least one of the problems with this unit. If not,

Okay, now re-done. I was having issues with a dodgy patch-lead which I've now replaced with a known good one. Attaching direct to "INT" this time, with the switch still set to "INT" I'm seeing 10Mhz

Yes the lab 8340B does have the new CPU board ( same part#) So I opened the lid and swapped CPU boards , my 8341B works ok with the CPU board from the 8340B except the top frequency is 26GHz , the

But then it seems to me that it has been corrected in the latest edition of the manual. However, highest esteem and admiration for HP ! - Cheers Attilio

Does the "lab" 8340B have the same CPU board as your "new" CPU? If not, how can putting the 92 FW on that board resolve anything? Are the PALS on the new CPU the same as the PALS on the old CPU

If you were familiar with them, it might have been tougher to make that mistake, but I recall a lot of confusion when solid state rectifiers first came out about which way they were to go in a circuit

I obtained a slightly newer than the ESG-3000 ESG about a year ago and the display was dark. When I got into it, the fluorescent lamp was working, but the silvering on the paper backing that reflects

The board goes through the regular cycle when powered up the only difference is that the frequencies the unit comes up with are screwed up ! The problem is that I don’t have any evidence that the

It would be a lot harder to make that mistake with a hollow state rectifier.? ;-)

My first question to you would be have you checked the backlighr and backlight inverter on the old LCD ? also on the replacement panel have you checked if the backlight used is the same kind ? Sent

All: Has anyone been able to add the IntuiLink add on to Excel 2016?? Rich

Hello Manfred, Good luck. The difference in the FW1 and FW is the polarity of the contrast bias.? If you put in the FW1 in the older model it will blow the transistor that supplies the contrast

@Jim Adney Just re-doing all the tests as not happy with the methodology I'd previously used. Best hang fire on any observations for now until I can confirm my findings - or otherwise as the case may

When you had the new board running the newer software were any of the CPU LEDs lit ? What evidence do you have that the firmware on the new CPU is functional (This is a long shot as I believe the CPU

“The 1962 manual, with vacuum tube rectifiers, has the polarity correct, so the error oscillated” ? ….. “Seems like a pretty rookie mistake for HP”. As I understand it, HP were rookies in