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Old 03-06-2011, 12:11 PM   #1
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Default Did I fry something?

MS3 and MS3X, home-built, with all the help of this thread.

Here's the problem: While testing the alternator circuit, I didn't remove the daughterboards, and now I can't get the MS to do anything. When I plug it into the computer, it recognizes the USB-serial converter, but I get no response at all from the MS, either on the stim or in the car.

It worked before I started (except the alternator circuit), but now it does not. I don't know where to start trying to figure out what's wrong. I've got 5v at all the proper pins on the main board when connected to the stim.
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Old 03-06-2011, 01:38 PM   #2
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you did load firmware?
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Old 03-06-2011, 02:32 PM   #3
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I didn't load any new firmware, just the stuff that was on there before. I'll try reloading firmware.
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Old 03-06-2011, 02:39 PM   #4
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If you built it, then you have to load firmware.

In fact, you're supposed to load firmware during the build in order to stim test I/O.
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Old 03-06-2011, 02:42 PM   #5
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Well, I loaded firmware on it once, but it's possible I somehow erased it, right?
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Old 03-06-2011, 02:52 PM   #6
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I tried loading the firmware again, and it gets hung up "Attempting Wakeup".
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Old 03-06-2011, 10:05 PM   #7
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I'm out of ideas. I have no idea how to test a board I didn't build when it won't connect to the computer. Does anybody have any suggestions on how to determine which board the problem may be on? I can only assume I fried something by applying too many volts, but I just hope I only fried one thing instead of all three or something.
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Old 03-07-2011, 04:53 AM   #8
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I'm pretty sure you can find the problem, if you have an oscilloscope. Just find the MS3 schematics, which are freely availabl...oh wait.
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Old 03-07-2011, 06:26 AM   #9
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Quote:
Originally Posted by Reverant View Post
I'm pretty sure you can find the problem, if you have an oscilloscope. Just find the MS3 schematics, which are freely availabl...oh wait.
I don't have an oscilloscope anyway.
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Old 03-07-2011, 09:36 AM   #10
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Its very possible you could have fried the CPU on the daughterboard. I've done it twice to my MS3.
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Old 03-07-2011, 11:22 AM   #11
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What are the symptoms of that? And is the only repair option a new ms3 board for $200?
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Old 03-07-2011, 10:37 PM   #12
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Well, I bought a new MS3 board, hopefully that fixes the problem. Of course I had to fry the most expensive part.
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Old 03-07-2011, 11:29 PM   #13
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might have been cheaper to ship it to DIY and let them test it.
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Old 03-08-2011, 09:23 AM   #14
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Or better, ship it to Peter Florance to let him repair it.
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Old 03-08-2011, 10:04 AM   #15
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Yeah Peter charged around $90 the second time around IIRC. Now that he knows what happens when they fry. First time was just under the cost of the MS3 due to all the diagnostics.
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Old 03-08-2011, 12:29 PM   #16
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How do I get in contact with this Peter Florance character?
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Old 03-08-2011, 12:32 PM   #17
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Peter Florance
PFTuning
757.685.3547
[email protected]
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