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Service Hints & Tips

Document ID: DETR-44KHX7

Aptiva - 2144/2168 (SL-C) Diagnostics - Power supply

Applicable to: World-Wide

___
|001|
|___|
- Check all drive and power supply connections for proper installation.
- Power off the system unit.
- Check the power cord for continuity. Replace if necessary.
- Check for the correct line voltage from the power outlet, and verify
that the voltage selector switch (if present) is set for the correct
voltage.
- Power on the system unit.
DOES THE POWER SUPPLY FAN RUN?
Yes No
| |
| |__
| |002|
| |___|
| - Go to Step 004.
|
|__
|003|
|___|
- Go to Step 009.
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___
|004|
|___|
(From step 002)
- Disconnect the power cord from the back of the system unit.

Note: The J29 and J30 power and switch connectors are latched. To
remove a latched connector, press in the latch using the tip of a
screwdriver to release the connector.

- Disconnect the power and switch cables from the system board (J8, J29,
and J30).
- Disconnect the power connectors to all drives.

Figure 2-1. Power Connectors J8 and J30, Switch Connector J29 on System
Board

- Make a connection between (jumper) pins 2 and 3 on the cable connector
J30 (see "System Board Layouts--Machine Types 2144 and 2168" in
topic 5.1 of the HMM for location).

Note: A paper clip may be used as a jumper.

Figure 2-2. Connector J30 on System Board

- Reconnect the power cord.
DOES THE POWER SUPPLY FAN RUN?
Yes No
| |
| |__
| |005|
| |___|
| Replace the power supply.
|
|
|__
|006|
|___|
(From step 010)
- With the system powered on and the fan running, disconnect the power and
switch cables from the system board (J8, J29, and J30).
- Check the voltages at the power supply connectors for the system board
and all drive connectors, as shown in the following figures.

Figure 2-3. System Board Power Supply Connectors (J8 Bottom View)

Figure 2-4. Hard Drive or CD-ROM End of Power Cable

Figure 2-5. 3.5-In. Diskette Drive End of Power Cable

ARE THE VOLTAGES CORRECT AND DOES THE FAN RUN?
Yes No
| |
| |__
| |007|
| |___|
| Replace the power supply.
|
|__
|008|
|___|
- The power supply is working normally. If the fan continues to run when
the J8 connector is plugged back in, go to "Undetermined Problem" in
topic 2.13. If the fan stops running when a drive connector is plugged
back in, go to "Factory-Installed Drive Devices" in topic 2.7.
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___
|009|
|___|
(From step 003)
DOES THE SYSTEM UNIT FAIL TO SHUT OFF WHEN THE ON/OFF SWITCH IS PRESSED?
Yes No
| |
| |__
| |010|
| |___|
| Go to Step 006.
|
|
|__
|011|
|___|
- You may have a failing on/off switch cable assembly.

Note: The J29 and J30 power and switch connectors are latched. To
remove a latched connector, press in the latch using the tip of a
screwdriver to release the connector.

- Disconnect the J29 switch connector on the system board and take an ohm
reading between the two pins of connector J29.
DO YOU HAVE AN OHM READING WHEN THE SWITCH IS PRESSED AND AN OPEN READING
WHEN THE SWITCH IS RELEASED?
Yes No
| |
| |__
| |012|
| |___|
| - Replace the on/off switch cable assembly.
|
|__
|013|
|___|
- Replace the system board.
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	Hint Category	Diagnostics, Power
	Date Created	28-01-99
	Last Updated	17-02-99
	Revision Date	16-02-2000
	Brand	IBM Aptiva
	Product Family	Aptiva
	Machine Type	2144, 2168
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