[cctalk] 5155 lugable

I finally got the missing keyboard and now it is time to try and revive it. A couple quick questions. It has a board in it called IBM PC INTERFACE with the numbers 170-18-165 and CIL18-16 printed on it. It has a 50 pin connector on the bracket end. If I take it out the machine dies almost immediately doing the POST. Tried Google with no luck. Anybody remember what it is? Next problem. 1701 error. Light on MFM drive flashes 3 slow and 4 fast continuously. Being as this machine was known to work when it was last shut down any suggestions? Could it be a stiction problem and the disk just isn't spinning up? (Can't tell by listening as the fan is pretty loud. Not bad just louder than any good disk I have ever heard.) And then one other not related to a problem. Being an original PC owned by users and not geeks is it likely that the floppy controller is one that can handle other formats (like TRS-80) and maybe even 8"? And just to wrap it up. What are the chances of finding an external drive or even a cable that could be made to connect to an external drive? Really hoping to get it to run. Would love to see what the Psychology Department had on it. At least WordPerfect as there is one of those function key templates taped on the keyboard. bill