IBM 770 Hardware Manual

SYMPTOM-TO-FRU INDEX

Symptom / Error

FRU / Action in Sequence

2XX

201: Memory data
error.
202: Memory line error
00–15.
203: Memory line error
16–23.

205: Memory test
failure on on-board
memory.
221: ROM to RAM
remap error.

1. Go to “Memory

Checkout” on
page 33.

2. DIMM card
3. System board

301, 303, 304, 305, 3XX
(301: Keyboard error.)

1. Go to “Keyboard or

Auxiliary Input
Device Checkout” on
page 32.

2. Keyboard
3. External numeric

keypad

  4. External keyboard
  5. Keyboard/mouse cable
  6. System board
  7. DC-DC Card

601, 6XX
(601: Diskette drive or
controller error.)

1. Go to “Diskette Drive

Checkout” on
page 31.

2. Diskette drive

assembly

3. Diskette
4. System board

602
(Diskette read error.)

1. Go to “Diskette Drive

Checkout” on
page 31.

2. Diskette
3. Diskette drive

assembly

604
(Unacceptable ID was read
from the diskette drive.)

1. Go to “Diskette Drive

Checkout” on
page 31.

2. Diskette drive

assembly

3. System board

808X

8081: PCMCIA
presence test failure.
(PCMCIA revision
number also checked.)

8082: PCMCIA register
test failure.

1. Reseat the PC Card

slot assembly.

2. PCMCIA device
3. System board

ThinkPad 770, 770E, 770X and 770Z