IBM PC730/PC750 - No display, 1-2-2 beep code after replacing system board

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Service Hints & Tips

Document ID: GSMH-3A8FF7

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IBM PC730/PC750 - No display, 1-2-2 beep code after replacing system board

Applicable to: World-Wide

Symptom:
IBM PC 700 MicroChannel Series systems 6876 and 6886 may exhibit a 1-2-2 beep code (one long, 2 short, 2 short) or no display after replacing the system board.

Problem Isolation Aids:
Remove the riser card from the PC 700 system exhibiting the symptom of "no display". If the system still posts a 1-2-2 beep code, this tip may not apply.

Note:
Disable the administrator password if it is set.

Remove the riser card from the system and access the Setup Utility by pressing F1 during the memory count. View the System Information selection for the Flash BIOS level. This tip applies only if the Flash BIOS level entry begins with the characters "N1."
Verify that the riser card FRU part number is P/N06H4018 or P/N06H4023.

Fix:
The failure symptom is due to the incorrect Flash BIOS on the system board. FRU P/N11H5545 is the only system board that should be installed in the 6876/6886 system. This system will not function with Flash BIOS type "N1" and a MicroChannel riser card installed. The Flash BIOS level indicated in the Setup Utility should begin with the characters "N2."
If the system contains the incorrect Flash BIOS, perform the following steps using an ISA/PCI riser:

1. Exchange the MicroChannel riser for an ISA/PCI riser. This will allow the system to boot properly.
2. Locate the file "ⅹMAGEM.USF" on the Microchannel Flash diskette. Remove the read-only attribute from that file by entering: "attrib -r ⅹMAGEM.USF" at a DOS prompt. Make sure that the directory containing the ATTRIB command is in the current path.
3. Rename the "ⅹMAGEM.USF" file on the MicroChannel Flash diskette to "ⅹMAGEV.USF."
4. Re-Flash the system with the latest level MicroChannel 700 Flash BIOS diskette and power off the machine when the update has completed. RE-INSTALL THE MICROCHANNEL RISER CARD.
5. Boot to the 700 MicroChannel Reference Diskette and go to the Startup Options section.
6. Select "diskette drive a:" as the first startup option and "hard disk 0" as the second startup option. Save the configuration and exit.
You must boot to the Reference Diskette immediately.

Note:
The "N1" type Flash BIOS can be installed onto a 6876/86 MicroChannel system inadvertently and result in the symptoms stated above. The "N2" Flash BIOS may also be installed onto a "N1" type ISA/PCI system 6875/6885 (system board FRU P/N88G4270) inadvertently and result in the identical failure symptoms. In each case, replacement of the system board may be necessary if the appropriate riser for the Flash BIOS type is not available for temporary use.

SAS KEYWORDS:
PSVP PSY2 D/T6876 IBMPC
6876 PSVPBRD PSY2BRD 6886
PSVPMCD PSY2MCD D/T6885 D/T6875
PC750 PC730 PC 730 PC 750
6885 6875 PSY2DISP PSVPDISP
ISA

Search Keywords

Hint Category

Retain, General Information

Date Created

27-09-95

Last Updated

24-04-98

Revision Date

23-04-99

Brand

IBM PC

Product Family

PC 730, PC 750

Machine Type

6875, 6876, 6885, 6886

Model

various

TypeModel

Retain Tip (if applicable)

H13964

Reverse Doclinks
and Admin Purposes

	Search Keywords
	Hint Category	Retain, General Information
	Date Created	27-09-95
	Last Updated	24-04-98
	Revision Date	23-04-99
	Brand	IBM PC
	Product Family	PC 730, PC 750
	Machine Type	6875, 6876, 6885, 6886
	Model	various
	TypeModel
	Retain Tip (if applicable)	H13964
	Reverse Doclinks and Admin Purposes