The start of the diagnostic code flash is signified by the light not flashing for two seconds. A '1' is signified by the light being illuminated for one second, and a '0' is signified by the light being illuminated for half a second. The interval between data bits is signified by the light not being illuminated for half a second. Error codes are read from the least significant bit to the most significant bit (backwards), and are read in hex.
For example, error code 12h would be signified by:
Off for two seconds (Start)
0, 1, 0, 0, 1, 0, 0, 0.

Error codes beginning with 1*h relate to the power adapter, and signify that it is not connected. These error codes run between 0x10 and 0x1F

Error codes beginning with 2*h relate to the 1st battery, and signify that it is not connected. These error codes run between 0x20 and 0x2F

Error codes beginning with 3*h relate to the 2nd battery, and signify that it is not connected. These error codes run between 0x30 and 0x3F

The following error codes are relevant if the AC adapter is connected. These error codes range from 0x40 to 0xDF and can signify a problem with the following:

4*h S3V output
5*h C5V output
6*h C3V output
7*h PPV output
8*h PGV output
9*h 1R5-E1V output
A*h 1R8-E1V output
B*h 2R5-B2V output
C*h 1R25-E1V output
D*h 2R5-E2V output
E*h
F*h

While the above should be enough to let you know what is going on, these may be necessary if you wish to diagnose and repair the problem yourself.

Full error codes are as follows:

10h AC Adaptor output voltage is more than 16.5 V.
11h Common Dock output voltage is more than 16.5 V.
12h Current from the DC power supply is more than the limit (6.16 A).
13h Current from the DC power supply is more than the limit (0.5 A) when there is no load.
14h Current sensing IC is not normal.
20h Main battery voltage is over 13.46V. (Not supported)
21h Main battery charge current is more than 5.06 A.
22h Main battery discharge current is more than 0.5 A when there is no load.
23h Main battery charge current is more than 2.70 A when DC IN direct charge is off.
24h Current sensing IC is not normal.
25h Main battery charge current is more than 0.3A when the battery isn't being charged.
40h S3V voltage is under or equal to 3.14V. (On/Off)
45h S3V voltage is under or equal to 3.14V. (Staring)
50h C5V voltage is over 6.00V.
51h C5V voltage is under or equal to 4.50V when the computer is powered on.
52h C5V voltage is under or equal to 4.50V when the computer is booting up.
53h C5V voltage is abnormal when the computer is suspended.
54h C5V voltage is abnormal when the computer shuts down.
55h C5V voltage is less than 4.50V when the computer is starting.
60h C3V voltage is over 3.96V.
61h C3V voltage is under or equal to 2.81V when the computer is powered on.
62h C3V voltage is under or equal to 2.81V when the computer is booting up.
63h C3V voltage is abnormal when the computer is suspended.
64h C3V voltage is abnormal when the computer shuts down.
65h C3V voltage is less than 2.81V when the computer is starting.
70h PPV voltage is over 1.56V.
71h PPV voltage is under or equal to 0.68V when the computer is powered on.
72h PPV voltage is under or equal to 0.68V when the computer is booting up.
73h PPV voltage is over or equal to 0.68V when the computer is powered off.
80h BGV voltage is over 2.28V.
81h BGV voltage is under or equal to 1.53V when the computer is powered on.
82h BGV voltage is under or equal to 1.53V when the computer is booting up.
83h BGV voltage is over or equal to 1.53V when the computer is powered off.
84h BGV voltage is abnormal when the computer is suspended or over 1.53V when the computer is suspended. Also, BGV voltage is more than 1.53V when the power off.
90h 1R5-E1V voltage is more than 1.80V when the computer is powered on or off.
91h 1R5-E1V voltage is not more than 1.275V when the computer is powered on.
92h 1R5-E1V voltage is not more than 1.275V when the computer is booting up.
93h 1R5-E1V voltage is not less than 1.275V when the computer is powered off.
94h 1R5-E1V voltage is not more than 1.275V when the computer is suspended.
A0h 1R8-E1V voltage is more than 2.16V when the computer is powered on or off.
A1h 1R8-E1V voltage is not more than 1.53V when the computer is powered on.
A2h 1R8-E1V voltage is not more than 1.53V when the computer is booting up.
A3h 1R8-E1V voltage is not less than 1.53V when the computer is powered off.
A4h 1R8-E1V voltage is not more than 1.53V when the computer is suspended.
B0h 2R5-B2V voltage is more than 3.00V when the computer is powered on or off.
B1h 2R5-B2V voltage is not more than 2.125V when the computer is powered on.
B2h 2R5-B2V voltage is not more than 2.125V when the computer is booting up.
B3h 2R5-B2V voltage is not less than 2.125V when the computer is powered off.
B4h 2R5-B2V voltage is not more than 2.125V when the computer is suspended.
C0h 1R25-E1V voltage is more than 1.50V when the computer is powered on or off.
C1h 1R25-E1V voltage is not more than 1.063V when the computer is powered on.
C2h 1R25-E1V voltage is not more than 1.063V when the computer is booting up.
C3h 1R25-E1V voltage is not less than 1.063V when the computer is powered off.
C4h 1R25-E1V voltage is not more than 1.063V when the computer is suspended.
D0h 2R5-E1V voltage is more than 3.00V when the computer is powered on or off.
D1h 2R5-E1V voltage is not more than 2.125V when the computer is powered on.
D2h 2R5-E1V voltage is not more than 2.125V when the computer is booting up.
D3h 2R5-E1V voltage is not less than 2.125V when the computer is powered off.
D4h 2R5-E1V voltage is not more than 2.125V when the computer is suspended.

update 16.05.2008
DC IN Error code Meaning
10h - AC Adaptor output voltage is more than 16.5 V.
12h - Current from the DC power supply is more than the limit (6.05 A).
13h - Current from the DC power supply is more than the limit (0.5 A) when there is no load.
14h - Current sensing IC is not normal.

Main Battery Error code Meaning
21h - Main battery charge current is more than 6.05 A.
22h - Main battery discharge current is more than 0.5 A when there is no load.
23h - Main battery charge current is more than 3.1A when DC IN direct charge is off.
24h - Current sensing IC is not normal.
25h - Main battery charge current is more than 0.3A when the battery isn't being charged.

S3V output Error code Meaning
40h - S3V voltage is not more than 3.14V when the computer is powered on or off.
45h - S3V voltage is not more than 3.14V when the computer is supports CV and is booting up.

C5V output Error code Meaning
50h - C5V voltage is more than 6.00 V when the computer is powered on or off.
51h - C5V voltage is not more than 4.50 V when the computer is powered on.
52h - C5V voltage is not more than 4.50 V when the computer is booting up.
53h - C5V voltage is not normal when the computer is suspended.
54h - C5V voltage is not normal when the computer supports CV and is suspended.
55h - C5V voltage is not more than 4.50V when the computer supports CV and is booting up.

C3V output Error code Meaning
60h - C3V voltage is more than 3.96 V.
61h - C3V voltage is not more than 2.81 V when the computer is powered on.
62h - C3V voltage is not more than 2.81 V when the computer is booting up.
63h - C3V voltage is not normal when the computer is suspended.
64h - C3V voltage is not normal when the computer supports CV and is shut down.
65h - C3V voltage is not more than 2.81V when the computer supports CV and is booting up.

PPV output (PCU core voltage) Error code Meaning
70h - PPV voltage is more than 1.56V when the computer is powered on or off.
71h - PPV voltage is not more than 0.68V when the computer is powered on.
72h - PPV voltage is not more than 0.68V when the computer is booting up.
73h - PPV voltage is not less than 0.68V when the computer is powered off.

BGVSNS output Error code Meaning
80h - BGVSNS voltage is not more than 1.62V when the computer is on or off.
81h - BGVSNS voltage is not more than 1.02V when the computer is powered on.
82h - BGVSNS voltage is not more than 1.02V when the computer is booting up.
83h - BGVSNS voltage is not less than 1.02V when the computer is powered off.
84h - BGVSNS voltage is not more than 1.62V when the computer is suspended.

1R5-E1V output Error code Meaning
90h - 1R5-E1V voltage is more than 1.80V when the computer is powered on or off.
91h - 1R5-E1V voltage is not more than 1.275V when the computer is powered on.
92h - 1R5-E1V voltage is not more than 1.275V when the computer is booting up.
93h - 1R5-E1V voltage is not less than 1.275V when the computer is powered off.
94h - 1R5-E1V voltage is not more than 1.275V when the computer is suspended.

1R8-E1V output Error code Meaning
A0h - 1R8-E1V voltage is more than 2.16V when the computer is powered on or off.
A1h - 1R8-E1V voltage is not more than 1.53V when the computer is powered on.
A2h - 1R8-E1V voltage is not more than 1.53V when the computer is booting up.
A3h - 1R8-E1V voltage is not less than 1.53V when the computer is powered off.
A4h - 1R8-E1V voltage is not more than 1.53V when the computer is suspended.

2R5-SNS output Error code Meaning
B0h - 2R5-SNS voltage is more than 3.00V when the computer is powered on or off.
B1h - 2R5-SNS voltage is not more than 2.125V when the computer is powered on.
B2h - 2R5-SNS voltage is not more than 2.125V when the computer is booting up.
B3h - 2R5-SNS voltage is not less than 2.125V when the computer is powered off.
B4h - 2R5-SNS voltage is not more than 2.125V when the computer is suspended.

1R25-E1V output Error code Meaning
C0h - 1R25-E1V voltage is more than 1.50V when the computer is powered on or off.
C1h - 1R25-E1V voltage is not more than 1.063V when the computer is powered on.
C2h - 1R25-E1V voltage is not more than 1.063V when the computer is booting up.
C3h - 1R25-E1V voltage is not less than 1.063V when the computer is powered off.
C4h - 1R25-E1V voltage is not more than 1.063V when the computer is suspended.

2R5-E1V output Error code Meaning
D0h - 2R5-E1V voltage is more than 3.00V when the computer is powered on or off.
D1h - 2R5-E1V voltage is not more than 2.125V when the computer is powered on.
D2h - 2R5-E1V voltage is not more than 2.125V when the computer is booting up.
D3h - 2R5-E1V voltage is not less than 2.125V when the computer is powered off.
D4h - 2R5-E1V voltage is not more than 2.125V when the computer is suspended.

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In the case of error code 10h or 12h:

Make sure the AC adaptor cord and AC power cord are firmly plugged into the DC IN 15 V socket and wall outlet. If the cables are connected correctly, connect a new AC adaptor and/or AC power cord, if necessary.

In the case of error code 2Xh:

Make sure the battery pack is correctly installed in the computer. If the battery pack is correctly installed, replace the battery pack with a new one.

If the error still exists, the system board or the battery board may be disconnected or damaged. Disassemble the computer and check the connection between the AC adaptor and the system board and connection between the system board and the battery board (if there is one, in my case it was integrated to ths system board).

After checking the connection, perform the following:
Check 1 - Replace the AC adaptor with a new one. If the AC adaptor is still not functioning properly, perform Check 2.

Check 2 - Use a multimeter to make sure that the F8800 fuse on the System board is not blown. If the fuse is not blown, go to Check 3. If the fuse is blown, go to Check 6.

Check 3 - Use a multimeter to make sure that the F1000 fuse on the Battery board is not blown. If the fuse is not blown, go to Check 4. If the fuse is blown, replace the Battery board with a new one following the instructions in Chapter 4.

Check 4 - Make sure that the Battery board cables are firmly connected to PJ8820 and PJ8821 on the System board and to PJ1000 and PJ1001 on the battery board. If they are connected firmly, go to Check 5.

Check 5 - The Battery board or System board may be damaged. Replace it with a new one following the instructions in Chapter 4.




update 16.05.2008


DC IN Error code Meaning
10h - AC Adaptor output voltage is more than 16.5 V.
12h - Current from the DC power supply is more than the limit (6.05 A).
13h - Current from the DC power supply is more than the limit (0.5 A) when there is no load.
14h - Current sensing IC is not normal.

Main Battery Error code Meaning
21h - Main battery charge current is more than 6.05 A.
22h - Main battery discharge current is more than 0.5 A when there is no load.
23h - Main battery charge current is more than 3.1A when DC IN direct charge is off.
24h - Current sensing IC is not normal.
25h - Main battery charge current is more than 0.3A when the battery isn't being charged.

S3V output Error code Meaning
40h - S3V voltage is not more than 3.14V when the computer is powered on or off.
45h - S3V voltage is not more than 3.14V when the computer is supports CV and is booting up.

C5V output Error code Meaning
50h - C5V voltage is more than 6.00 V when the computer is powered on or off.
51h - C5V voltage is not more than 4.50 V when the computer is powered on.
52h - C5V voltage is not more than 4.50 V when the computer is booting up.
53h - C5V voltage is not normal when the computer is suspended.
54h - C5V voltage is not normal when the computer supports CV and is suspended.
55h - C5V voltage is not more than 4.50V when the computer supports CV and is booting up.

C3V output Error code Meaning
60h - C3V voltage is more than 3.96 V.
61h - C3V voltage is not more than 2.81 V when the computer is powered on.
62h - C3V voltage is not more than 2.81 V when the computer is booting up.
63h - C3V voltage is not normal when the computer is suspended.
64h - C3V voltage is not normal when the computer supports CV and is shut down.
65h - C3V voltage is not more than 2.81V when the computer supports CV and is booting up.

PPV output (PCU core voltage) Error code Meaning
70h - PPV voltage is more than 1.56V when the computer is powered on or off.
71h - PPV voltage is not more than 0.68V when the computer is powered on.
72h - PPV voltage is not more than 0.68V when the computer is booting up.
73h - PPV voltage is not less than 0.68V when the computer is powered off.

BGVSNS output Error code Meaning
80h - BGVSNS voltage is not more than 1.62V when the computer is on or off.
81h - BGVSNS voltage is not more than 1.02V when the computer is powered on.
82h - BGVSNS voltage is not more than 1.02V when the computer is booting up.
83h - BGVSNS voltage is not less than 1.02V when the computer is powered off.
84h - BGVSNS voltage is not more than 1.62V when the computer is suspended.

1R5-E1V output Error code Meaning
90h - 1R5-E1V voltage is more than 1.80V when the computer is powered on or off.
91h - 1R5-E1V voltage is not more than 1.275V when the computer is powered on.
92h - 1R5-E1V voltage is not more than 1.275V when the computer is booting up.
93h - 1R5-E1V voltage is not less than 1.275V when the computer is powered off.
94h - 1R5-E1V voltage is not more than 1.275V when the computer is suspended.

1R8-E1V output Error code Meaning
A0h - 1R8-E1V voltage is more than 2.16V when the computer is powered on or off.
A1h - 1R8-E1V voltage is not more than 1.53V when the computer is powered on.
A2h - 1R8-E1V voltage is not more than 1.53V when the computer is booting up.
A3h - 1R8-E1V voltage is not less than 1.53V when the computer is powered off.
A4h - 1R8-E1V voltage is not more than 1.53V when the computer is suspended.

2R5-SNS output Error code Meaning
B0h - 2R5-SNS voltage is more than 3.00V when the computer is powered on or off.
B1h - 2R5-SNS voltage is not more than 2.125V when the computer is powered on.
B2h - 2R5-SNS voltage is not more than 2.125V when the computer is booting up.
B3h - 2R5-SNS voltage is not less than 2.125V when the computer is powered off.
B4h - 2R5-SNS voltage is not more than 2.125V when the computer is suspended.

1R25-E1V output Error code Meaning
C0h - 1R25-E1V voltage is more than 1.50V when the computer is powered on or off.
C1h - 1R25-E1V voltage is not more than 1.063V when the computer is powered on.
C2h - 1R25-E1V voltage is not more than 1.063V when the computer is booting up.
C3h - 1R25-E1V voltage is not less than 1.063V when the computer is powered off.
C4h - 1R25-E1V voltage is not more than 1.063V when the computer is suspended.

2R5-E1V output Error code Meaning
D0h - 2R5-E1V voltage is more than 3.00V when the computer is powered on or off.
D1h - 2R5-E1V voltage is not more than 2.125V when the computer is powered on.
D2h - 2R5-E1V voltage is not more than 2.125V when the computer is booting up.
D3h - 2R5-E1V voltage is not less than 2.125V when the computer is powered off.
D4h - 2R5-E1V voltage is not more than 2.125V when the computer is suspended.

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In the case of error code 10h or 12h:

Make sure the AC adaptor cord and AC power cord are firmly plugged into the DC IN 15 V socket and wall outlet. If the cables are connected correctly, connect a new AC adaptor and/or AC power cord, if necessary.

In the case of error code 2Xh:

Make sure the battery pack is correctly installed in the computer. If the battery pack is correctly installed, replace the battery pack with a new one.

If the error still exists, the system board or the battery board may be disconnected or damaged. Disassemble the computer and check the connection between the AC adaptor and the system board and connection between the system board and the battery board (if there is one, in my case it was integrated to ths system board).

After checking the connection, perform the following:
Check 1 - Replace the AC adaptor with a new one. If the AC adaptor is still not functioning properly, perform Check 2.

Check 2 - Use a multimeter to make sure that the F8800 fuse on the System board is not blown. If the fuse is not blown, go to Check 3. If the fuse is blown, go to Check 6.

Check 3 - Use a multimeter to make sure that the F1000 fuse on the Battery board is not blown. If the fuse is not blown, go to Check 4. If the fuse is blown, replace the Battery board with a new one following the instructions in Chapter 4.

Check 4 - Make sure that the Battery board cables are firmly connected to PJ8820 and PJ8821 on the System board and to PJ1000 and PJ1001 on the battery board. If they are connected firmly, go to Check 5.

Check 5 - The Battery board or System board may be damaged. Replace it with a new one following the instructions in Chapter 4.