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3.736 bytes |
Service Hints & Tips |
Document ID: JBAR-3NZM9F |
IBM PC300GL - System does not boot after power-on
Applicable to: World-Wide
SYMPTOM:
The IBM PC 300GL Series 6272 & 6282 may exhibit the following symptoms after pressing the power-on button located at the front of the system unit, or by powering on the system unit via a power strip/surge suppressor:
1. When the system is powered on, the green LED on the front of the system unit turns on and the internal fan begins to turn.
2. The display remains blank. There is no synchronization of display with the system unit.
3. The hardfile LED, diskette LED, and CDROM LED (if present) do not turn on.
4. No audible beep is heard from the system unit to indicate a successful completion of the Power On Self Test (POST).
PROBLEM ISOLATION AIDS:
The symptom described above is exhibited only after the installation of ISA adapters. Systems with no adapters installed will not exhibit this symptom.
IF THE SYMPTOM IS INTERMITTENT:
Powering the system OFF then ON allows the system to power-up normally and function properly.
IF THE SYMPTOM IS A SOLID FAILING CONDITION:
1. Remove all ISA adapter cards from the riser.
2. Power ON the system unit and determine if the hang condition continues.
3. If the hang condition no longer remains, re-install the ISA adapter cards one at a time to determine if the failing condition re-occurs.
4. If one ISA adapter can be isolated as the cause of the failing condition, check/replace the adapter and return to step 2.
5. If replacing the ISA adapter does not resolve the failing condition, replace the system board.
FIX:
Do not replace parts until adapter conflicts are ruled out.
The symptom described above is caused by the "Address Transition Detection" (ATD) circuit used in the Flash BIOS ROM module to improve the performance of data transfer to the ISA Bus. On rare occasions, the sensitivity of this circuit prevents the system from POSTing due to the detection of noise typically produced by the introduction of certain ISA adapter cards.
If the system exhibits the intermittent or consistet symptom as stated above, simply depress the power button again or follow the isolation procedures. This symptom does not damage any adapters, system unit hardware, peripherals or software. The symptom does not in any way affect the operation of the system once POST is completed successfully.
SAS KEYWORDS:
PSVP PSY2 PSVPERR PSY2ERR PSVPPART PSY2PART IBMPC LOCKUP D/T6272 HANG PSVPBRD PSY2BRD PSY2ADPT UNCLASSIFIED PSVPADPT 300 GL
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Hint Category |
Retain, General Information | |
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Date Created |
20-11-97 | |
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Last Updated |
17-04-98 | |
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Revision Date |
15-04-99 | |
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Brand |
IBM PC | |
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Product Family |
PC 300GL | |
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Machine Type |
6272, 6282 | |
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Model |
all | |
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TypeModel |
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Retain Tip (if applicable) |
H161009 | |
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