Topic: On-board Diagnostics
There is a board in the 128XP10 called an Output Controller (OC3), on that board there are 2 rows of very important EPROM (erasable programmable read only memory) chips. 4 of them are labeled "SYSCON", and the other 4 are labeled "OCWARE". SYSCON chips are on every single 128XP ever created. OCWARE however, is not on every system created. They contain diagnostic utilities designed to aid field service personnel in troubleshooting system issues.
To access these utilities you will first need to have the OCWARE chips on the OC3, then a command line and lastly a series of commands that unlock the door to manual diagnostics.
Please follow the steps located below according to the pictures. If they do not work, then you may not have the onboard diagnostic chips. Please contact me if you do not and I will try to accommodate. Also note that I cannot support Rev. 23 and below for the diagnostic utilities. Rev. 25 and above is fine though.
First step is to access the command line. To do this you will need to locate the TEST key on the 128XP, as can be seen below, and while the system is OFF, hold the TEST key in, then power the system ON.
Continue holding until you see this screen:
Type the information you see below, keeping in mind that you need to press enter after each line. I will put it in text as well just so you have the right steps, then the finished product on the screen.
S10BFBA (press Return)
01 (press Return)
G262B600 (press Return)
If all goes well you should be directed to this screen:
At the $_ command line type in PM and press Return. PM = Periodic Maintenance, it takes about... 45-60 minutes to complete and once finished it will display a notification of what tests failed. If nothing has failed it will say "failed 0 tests", as can be seen in the screen below.
If you do have errors, type in STAT and press Return. It will display a list of all the test #'s that failed. Write those down, and post them in this thread. I can help you determine what these tests are and what they mean, as well as how to run individual tests and check for channel failures in boards, etc, etc.
1-800-416-7567