Toshiba PORTEGE M300 Maintenance Manual page 63

2.3 Power Supply Troubleshooting
? 1R25-P1V output (P75)
Error code
D0h 1R25-P1V voltage is over 1.50 V when the computer is powered on/off.
D1h 1R25-P1V voltage is 1.063 V or less when the computer is powered on.
D2h 1R25-P1V voltage 1.063 V or less when the computer is booting up.
D3h 1R25-P1V voltage is 1.063 V or over when the computer is powered off.
D4h 1R25-P1V voltage is 1.063 V or less when the computer is suspended.
? 2R5-B2V output (P77)
Error code
E0h 2R5-B2V voltage is over 3.00 V when the computer is powered on/off.
E1h 2R5-B2V voltage is 2.125 V or less when the computer is powered on.
E2h 2R5-B2V voltage is 2.125V or less when the computer is booting up.
E3h 2R5-B2V voltage is 2.125 V or over when the computer is powered off.
E4h 2R5-B2V voltage is 2.125 V or less when the computer is suspended.
Check 2 In the case of error code 10h or 12h:
? Make sure the AC adapter and AC power cord are firmly plugged into the DC IN 15
V socket and wall outlet. If the cables are connected firmly, go to the following step:
? Connect a new AC adapter and AC power cord. If the problem still occurs, go to
Procedure 5.
Check 3 In the case of error code 21h:
? Go to Procedure 3.
Check 4 For any other errors, go to Procedure 5.
2-14
2 Troubleshooting Procedures
Meaning
Meaning
PORTEGE M300 Maintenance Manual (960-504)