fischer@milton.acs.washington.edu (S Somasundaram) (02/28/90)
As my previous posting suggested, I have the following problem:
I had decided to change the power supply on my IBM-PC XT. I went to a
local computer store (Delphi Compyters and Peripherals in Greenlake for
the locals) and bought a 150W power supply that says it is meant as a
replacement for XTs.The catch:
I couldn't change the power supply without dislodging the hard and the
floppy drives. Mine has one of each (D: and A:). There were some
problems, but eventually I got the right connections and it started to
work. When I put the cover back, the thing won't work. It gives (an
error message I suppose) the following after whirring for about 20
seconds)....
1) Displays the message 7055 201 (yes, there's a space in between)
2) Beeps at you after some more time
3) The floppy drive keeps rotating till you power down. Read, it does
not recognise a DOS diskette (same version) in drive A:. It used to
just a day ago with the same symptoms. NOTHING ELSE TO REPORT.
TRIES : I tried disconnecting the cables leading to drive A:, keeping
the one on drive D: Result?
7055 201
601 (presumably, dirve a: missing/not ready message..)
Now drive A: does not spin but an I/O is attempted on drive d:,
I can see the light go on and THEN SILENCE. Sometimes the
monitor is screwed up after a while.
I disconnected both drives A: and D: from the main(?) board.
Now I get
7055 201
FATAL DISK ERROR
DRIVE NOT READY
601
After a while it goes into BASIC. (says 62940 K memory)
Sorry if the details are boring but I have tried my best to solve before asking
once again for NET WISDOM :(
CONFIGURATION :
IBM PC-XT 8088 W/ ONE HARD (D:) AND ONE FLOPPY DRIVE(A:)
* LOW-LEVEL FORMAT USING DISKMANAGER JUST A FEW WEEKS AGO.
* SEA GATE ST225 20MEG HARD DRIVE WITH XEBEC CONTROLLER.
* UPWARDS OF 6 YEARS OLD.
* ORIGIN OF PROBLEM : ATTEMPT TO CHANGE A 63.5W POWER SUPPLY
TO A 150W ONE.
* LOADED WITH TONS OF BOARDS. I AM NOT EVEN SURE OF WHAT IS WHAT
* HAS CGA AND MONOCHROME MONITOR
Thanks. e-mail is probably appropriate. I do read the net.
Can ANY KIND GURU let me know where all these messages are documented? I don't
speak binary or HEX and this is frustrating. What manual, I assume there is
documentation, has explanations for these strange numbers and is there a
troubleshooter's guide? I have tried looking into the DOS manual. NO GOOD. The
technical ref. seems to written for those tortured souls who understand
gibberish.
fischer@milton.u.washington.edu
Also fischer@toby.ucs.washington.edu(BITNET)