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Re: [HP8920/8935 Family] HP8924C ROM Checksum error Few additional notes about "leaked" EPROMs data recovery. CMOS chips 27Cxxx allow quite deep lowering of Vcc, some to almost 3.3V level, and

Re: [HP8920/8935 Family] HP8924C ROM Checksum error Hello, Friday, July 29, 2022, 0:23:21, wspx472 wrote: After sitting a couple of months, my 8924C now displays a "ROM Checksum Error". I also have an

Check with Rick at http://amtronix.com/. He’s one of the best in dealing with these units. KE6CD

After sitting a couple of months, my 8924C now displays a "ROM Checksum Error". I also have an "E" model I bought mostly as an organ donor for the "C" model. I put the A16 card from the "E" model in

I have an 8924C with the same problem. Looking like it is the boot ROM. HP part number 08920-87168. They seem to be unobtanium. Anyone know where I might find one? I did try an A16 board from an "E"

the error 200 means that one of the boards is not communicating or holding the serial bus down. you may want to run the diagnostics and see what it says.? The?MSDIAGS3 will run the self test and you

If it no longer has the power-on settings saved, this suggests that the memory battery needs replacing.? Then with a new battery, to make it again act like an 8920 on power-up you can follow the

So I recapped my HP8924C power supply because I had the intermittent wouldn't power on issue. But since then I lost my power on default settings and was presented with the cell site call screen

Alberto, I hope you found the files that you needed. If not, just subscribe to the group. I believe A.18.10 FW requires a newer memory board than what I have. Let us know if you are successful. Greg

Hello Greg, Thank you for your kind reply. In fact, I was not subscribed to the specific group, hence I could not find the folder with files. Just in case you are aware of details, my 8920A is

Glad Rick got you fixed up. He's always treated me fairly. The hardest part about shipping 892x's to Rick is the packing and shipping costs. I have a box that has made a few trips back and forth to

Hello, Alberto.Go to /g/HP-Agilent-Keysight-equipment?In the files section. Here is a link that should take you right to

Hello Greg, I also happen to have my 8920A under repair, and I'd like to upgrade FW A.06.12 to a more recent one. Do you have any download links for later firmware? Thank you in advance. Alberto

Thanks, John?Sent from my Galaxy

Just to close the loop on this, I sent my 8921A to Amtronix.? Rick got it all fixed, and also replaced the electrolytics in the power supply, semi-affordably.? I'm happy. 73 Jeff n1kdo

Thanks everyone From the manuals , I think that G8RPI is correct, It would be a spectrum analyzer with a 5 KHz resolution on the screen. and a freq gen. Maybe also an audio gen and a freq counter in

usually that goes without a problem.? Some of the programs may need the larger memory though. Usually updating the memory is not an issue either.? The chips are still around as well, I would backup

Almost totally useless for analog radio work. At best you get a CW RF Generator and a fairly crippled spectrum analyser. They are not worth the space. The 8924C is another matter. Looks the same but

Hello, all. I have an early 8920a sn 3211Axxxxx with version A.6.11 firmware and option 005 (memory upgrade) and would like to upgrade the firmware to A.14.14. I have the eproms (dip type) already

George: Gosh, Sorry, it is the 8922M Yea the models are significantly different. Wally