🚀 go-pugleaf

In article <1991Feb21.152120.19737@eng.ufl.edu> spike@wasp.eng.ufl.edu (Spike) writes:

    Help! I have a dead Turbo Sport, ZTC-3034-EB type. When I turn
    it on, it clicks, and the screen flickers, then nothing. The hard
    drive doesn't spin up, the flpy drive doesn't access, and yet the
    LEDs give me the indication that it thinks that it's on! So now I 
    turn it off, and it appears to go through a normal power down.

    My first move was to load the power supply down to the specified
    power requirements. (this was done isolated from the rest of the 
    machine) The power supply failed in grand fashon. I replaced the   
    power supply and it didn't fix the problem, it failed in the same
    way.

    Now after a quick and dirty look at the diagrams it looks to me 
    that the power uo logic is in the I/O board. I replaced that to
    no avail.

    So now the only thing left in the power system is this little board
    called the Power logic board. This is a small board that the external
    power supply and the battery both plug into. It has a few relays on
    it and sends power to the power supply for rectification. So I change
    this board. NOTHING. 

    So my question to the net is: Has anybody seen this before?
    Can the mylar cpu cable cause it? cpu? does anybody have any suggestions
    for my next move???

Yup..  I've seen something like this.  I thought it was my hard disk
because shortly before it started doing this, my HD was making very
strange noises.  I opened it up and unplugged the hard disk.  I was
able to boot off of floppy after using the SETUP to say that I had no
HD.  It worked great as a 1 floppy system until I could afford to get
a new HD.  All is fine now.
This was in a SuperSport 286 with 40 meg.

Paul L.
--
pel@ctron.com              #include <disclaimer>
Cabletron Systems Inc.

 Thanks for the response Paul L.
 
 As a Zenith Tech I've seen the problem you described a few times.
 But I think this problem lies in the Turbo Sport Arena, I'm not 
 saying your suggestion isn't valid, in fact it was the very first
 thing I did. It seems the mylar I/O-CPU "flex board" can be the cause
 of a lot of problems. I'm not in a hurry to put any more parts on 
 order, which is why I sought help from the masses hoping somebody
 had seen this particular mind bender.
 take care and thanks again.

Ken Gage.....Care taker of Zenith Heaven, University of Florida.