Troubleshooting
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
6- 63
Table 6- 12: BIOS error codes and explanations (Cont.)
Error code
Action to be taken
Error code explanation
Invalid NVRAM
media type
The BIOS can not access the NVRAM.
Replace the memory SO DIMMs.
Keyboard con-
troller error
The keyboard controller may be defective.
Swap keyboard with a known
good keyboard.
Replace the benchtop controller
module.
Keyboard error
The keyboard may be missing or
defective.
Swap keyboard with a known
good keyboard.
Keyboard error
nn
There may be a stuck or defective key.
The BIOS returns the address of the key
where HEX nn is the address of the key.
Swap keyboard with a known
good keyboard.
Operating sys-
tem not found
The operating system can not be found.
Insert a bootable disk into the
floppy disk drive and try to
reboot.
Reload the Windows operating
system.
Parity Check 1
A parity error was found on the commu-
nications bus. The BIOS will return the
address of the error or display ???? if it
cannot.
There may be a bad connection
between the benchtop controller
and the Benchtop Chassis, or the
benchtop controller is not
installed at slot zero and one.
Turn the power off, remove the
benchtop controller. Inspect the
connectors on the rear of the
benchtop controller. Install the
benchtop controller into slot zero
and one.
Apply power and re-test.
Parity Check 2
A parity error was found on the I/O bus.
The BIOS will return the address of the
error, or display ???? if it cannot.
The controller board may be
defective.
Replace the benchtop controller.
Press <F1> to
resume, <F2>
to Setup
This message is displayed after a
recoverable error message.
This is a information message.
Press the <F1> key to restart the
boot process, or press the <F2>
key to enter the CMOS setup
and make changes to the defini-
tions.
Verify that the CMOS setup is
configured correctly.
Press <F2> to
enter
SETUP
This is an optional message that can be
turned on and off in CMOS setup. It is
only displayed during a POST test.
This is a information message.
Summary of Contents for TLA7XM
Page 5: ......
Page 13: ...Table of Contents viii TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 17: ...Service Safety Summary xii TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 21: ...Preface xvi TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 25: ...Introduction xx TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 43: ...Specifications 1 18 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 85: ......
Page 87: ...Adjustment Procedures 5 2 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 161: ...Repackaging Instructions 6 74 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 165: ...Electrical Parts List 8 2 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 169: ...Diagrams 9 4 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...
Page 189: ...Mechanical Parts List 10 20 TLA721 Benchtop TLA7XM Expansion Mainframe Service Manual ...