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4.750 bytes |
Service Hints & Tips |
Document ID: GSMH-398CDM |
IBM PC730/PC750 - Configuration of setup utility errors
Applicable to: World-Wide
Symptom:
The IBM PC 700 Series system may display the following symptoms after replacing the system board, following configuration changes, or immediately following system installation:
1. 161/162/163 Configuration errors.
2. 1962 POST errors.
3. Missing or incorrect entries in the Setup Utility.
4. Beep codes indicating a CMOS or ROM BIOS error.
Problem Isolation Aids:
None.
Fix:
Before replacing the system board for the above symptoms, perform the following steps to clear CMOS:
1. Power the system unit off, remove the top cover assembly and locate jumper J40. J40 is located to the left of the riser card socket, next to the video memory upgrade sockets. Jumper J40 is also known as the Password Bypass Jumper.
2. Move the J40 jumper from the default position, pins 2 & 3 to pins 1 & 2.
3. Power the system on and allow POST to complete (1 or 2 audible beeps).
4. Power the system unit off and return the J40 jumper to its original position (pins 2 & 3).
5. Power the system unit on. POST errors will be received indicating that a configuration change has occurred. View the Setup utility and verify that the correct entries are present for the hardware installed (adapter cards will not be present in the Setup Utility). Save the changes and exit the Setup Utility. Allow the system to reboot. There should be one audible beep at the end of POST.
If the system continues to POST configuration errors after performing the steps above and/or the entries in the Setup Utility do not match the hardware configuration, perform the next set of instructions to drain CMOS:
1. Turn the system power off. Remove the AC line cord from the AC receptacle.
2. Remove the top cover assembly and locate the battery (left rear of the system board).
3. Remove the battery from the system board or slide a piece of paper between the battery and the metal contact strip on top of the battery.
4. Allow the system to remain in this state for a minimum of 15 minutes.
5. Install the battery or remove the paper strip, and reattach the AC line cord. Turn power on and allow the system to complete POST. The system will post configuration errors indicating that a change has occurred.
Note:
This procedure may be used if a CMOS virus is suspected. As a part of step #1, remove the hardfile signal cable from either the system board or the rear of the boot drive. If the system is booted from a diskette, replace the boot diskette with a bootable DOS diskette that has not been used on any system in the account.
Allow CMOS to drain and reboot the system WITHOUT the boot drive or normally used boot diskette. Perform two cold boots (off/on) to verify a successful completion of POST, then reattach the boot drive. Run Viruscan immediately.
If the failures persists, continue normal problem determination.
Keywords:
IBMPC PSY2 PSVP 6885
6875 D/T6885 D/T6886 D/T6876
PSVPERR PSY2ERR 6886 6876
D/T68XX 68XX CONFIG 161
162 163
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Hint Category |
Retain, General Information | |
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Date Created |
26-07-95 | |
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Last Updated |
27-04-98 | |
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Revision Date |
23-04-2000 | |
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Brand |
IBM PC | |
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Product Family |
PC 730, PC 750 | |
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Machine Type |
6875, 6885, 6876, 6886 | |
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Model |
various | |
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TypeModel |
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Retain Tip (if applicable) |
H13303 | |
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Reverse Doclinks |