H043664 8530 CURSOR KEYS AND 501 POST ERRORS

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Louis Ohland

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Nov 17, 2021, 3:00:18 PM11/17/21
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SYMPTOM:
ON A LIMITED NUMBER OF PS/2 8530 SYSTEMS, USE OF THE CURSOR
MOVEMENT KEYS MAY CAUSE UNEXPECTED CHARACTERS TO APPEAR ON THE
DISPLAY. THIS PROBLEM IS LIMITED TO 8530 MODELS 001 AND 021
ONLY. THIS PROBLEM MAY BE INTERMITTENT, AND MAY NOT BE DETECTED
BY ADVANCED DIAGNOSTICS.
THE 501 POST ERROR APPEARS WHEN TWO OR MORE OPTION CARDS ARE
INSTALLED IN THE 8530. THESE OPTIONS INCLUDE THE 3270 and TOKEN
RING ADAPTERS (HALF SIZE CARDS). THIS PROBLEM IS ALSO LIMITED TO
8530 MODELS 001 AND 021. THE 501 WILL SHOW AS A DISPLAY ERROR.

PROBLEM ISOLATION AIDS:
IF SYMPTOMS APPEAR AS DESCRIBED, VISUALLY INSPECT THE 8530
SYSTEM BOARD MODULES IN POSITIONS U9 AND U15.
MODULE U15 IS NEXT TO THE SPEAKER AND U9 NEXT TO THE MATH CO-
PROCESSOR CHIP HOLDER.
U9 P/N72X8203 WITH IBM PRINTED ON CHIP IS SUSPECT
U15 P/N61X8965 WITH IBM PRINTED ON CHIP IS SUSPECT
GOOD CHIPS WILL HAVE THE WORD "JAPAN" PRINTED ON THEM; AFFECTED
CHIPS WILL NOT.
SYSTEM UNITS WITH SERIAL ABOVE 55-00HV000 HAVE THE NEW BOARD
FACTORY INSTALLED.

FIX:
IF THE MODULES IN POSITION U9 AND U15 DO NOT HAVE "JAPAN"
PRINTED ON THEM, THE SYSTEM BOARD SHOULD BE REPLACED BY NEW
SYSTEM BOARD FRU P/N64F3453. THE REMOVED SYSTEM BOARD
SHOULD BE RETURNED TO BE UPDATED TO NEW EC LEVEL VIA
NORMAL REPAIR CHANNELS (ERC)
(IF THE MATH COPROCESSOR IS INSTALLED IT SHOULD BE REMOVED
AND REINSTALLED IN THE NEW FRU)
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