Ibm 6643 User Manual download pdf (Page 25)

Pin

Signal

Function

5

COM

Ground

6

5

V

+5

V

dc

7

COM

Ground

8

POK

Power

Good

9

5VSB

Standby

Voltage

10

12

V

+12

V

dc

11

3.3

V

+3.3

V

dc

12

-12

V

-12

V

dc

13

COM

Ground

14

PS-ON

DC

Remote

Enable

15

COM

Ground

16

COM

Ground

17

COM

Ground

18

-5

V

-5

V

dc

19

5

V

+5

V

dc

20

5

V

+5

V

dc

If

the

voltages

are

not

correct,

and

the

power

cord

is

good,

replace

the

power

supply.

Display

Note:

The

number

of

defective

pixels

to

qualify

a

TFT

LCD

panel

to

be

replaced

under

warranty

is

8

or

more

for

all

types

2179

and

6643

computers.

If

the

screen

has

no

display

(black

screen),

do

the

following:

1.

Replace

power

supply.

2.

Replace

inverter

card.

3.

Reseat/replace

receiver

board

(receiver

board

is

behind

the

LCD

display.

If

the

screen

comes

on,

then,

quickly

goes

black,

do

the

following:

1.

Check

power

supply

fan.

If

fan

is

running:

a.

Replace

inverter

board.

b.

Replace

receiver

board.

2.

If

Power

supply

fan

is

not

running,

replace

the

power

supply.

If

the

screen

pallet

color

is

wrong,

do

the

following:

1.

Replace

LCD

signal

cable.

2.

Replace

receiver

board.

3.

Replace

system

board.

If

there

are

scaling

problems,

do

the

following:

1.

Assure

latest

level

video

drivers

are

installed.

Chapter

4.

FRU

replacements

17

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