What I did in several P4 systems through a program call vmware setup all dos and various enviroments created on single image and ran it through all machines via a player didn't matter if it was windows or linux.

Well there could be several components that you may have to look at thoroughly.
1). volume switch make sure it's not loose and solder is good.
2). Coils behind accessory jack make sure there not open.
3. Make sure you could ohm out the accessorie jack. (sometimes accy jack has dirty faulty contacts ...

I recently acquired a mobile astro spectra. The one I have has knobs for vol & mode I believe. I was wondering if it would do digital? I read online the way to figure out was to read the flashcode. I need to know what is the last software build/version and part number of the software. Also, is this ...

You may have a international version or a board that the board/guts are different then the actual case. Try reading it with the gp88 software. That particular software will read just about any radio gp300, gp350, p110, and of course gp88.

Actually I ran into this problem myself were by some times I power up a radio via the vehicle through ignition sense. The Fail 01/90 error would appear. So it took me some time, but it turn-out to be a poor ground connection, at least for me . Hope this helps.

Iwill tried to verify if the Tx radio work's properly first. You shoud be able to hook a palm or desk mic directly into the radio and key it up then measure the output with a watt meter or a service monitor without the duplexer in place. Also, see if your able to describe the model # if it's a lo ...

I seen this several times and there are a few more thing's I would check. Also, you said you tried an SP50 x-tal, don't know if that will work, due mostly to differences in part specs.

Here are other things you could check on your Ht1250
This is probably more in depth trouble-shooting requires ...

Actually most post are correct the highest you coul actually go up to is R05.07B, from R01.00.00. Then go up to current R05.13.04. Silly, but true. Now for Motorola actually recognizing something it's a hit or miss.

I have mines setup with Vmware to emulate all the Dos stuff works good for moto, kenwood, vertex Dos stuff.