I recently purchased a used “for parts” Rohde & Schwarz CMU200 that showed the video working but had a missing front foot and had an error on boot (pic 1). When I received it the video was rolling like it didn’t have sync(pic 2). Luckily the external VGA port worked great and I saw the CMOS battery was bad. When I reset the BIOS to CMU defaults and had the same result I started looking at other settings in the BIOS but nothing was helping so I moved on to the software error.
Turning it on a few times, it never got past the error to fully boot. Good, I hate intermittent faults. I used Alt-F4 for DOS to run scandisk and defrag(full drive, not just fragmented files). Defrag showed 2 blocks that were previously marked as bad but overall there were no new issues. I then backed up the drive with ddrescue and it showed the same results as defrag; 2 bad blocks on the drive. The speed was fine unless it was reading just those 2 bad blocks and it never made any weird noises. However, I despise HDDs so I tried to replace it with a CF card to IDE adapter with the HDD image(pic 3). The BIOS recognized the device but it POSTed very slowly and ultimately couldn’t find the O.S. Back into the CMU it went until I could order a PATA SSD.
Since the error happened toward the end of the loading process I was able to choose the option at the bottom left of the screen to load defaults. Surprisingly, that worked! I rebooted again out of disbelief but it was working fine. I suppose a bad block may have corrupted some setting that factory defaults resolved. Preliminary tests using SA, Power, etc. all function as expected. I will run full self-tests and alignment when I have it fully assembled again.
To do:
1. Replace HDD with SSD
2. Fix video sync issue. Probably have to take apart the front panel
3. Replace CMOS battery.
4. Check front panel fans and cpu heatsink/thermal paste (the CPU showed a high temp in BIOS)
5. I searched high and low but noticed there are no options for people with a completely empty/new drive to install R&S software. The answer is always: “Clone the old HDD”. I would like to find a way to copy Version Manager to an empty DOS 6.22 drive to facilitate the rest of the R&S software install.
6. Find a replacement front foot with extender.
7. Make the wife jealous by the way I stare at the new addition on my bench.
** Edited: I had a picture of the wrong CF card. Now pic 3 is accurate. SanDisk Extreme 32GB UDMA7