Toshiba Satellite M40 / M45 No Power

The power supply in the computer controls many functions and components. To check if the
power supply is defective or malfunctioning, follow the troubleshooting procedures below as
instructed.
Procedure 1 Power Icon Check
Procedure 2 Connection Check
Procedure 3 Replacement Check
Procedure 1 Power Icon Check
The following two power LEDs indicate the power supply status:
􀂉 Battery LED
􀂉 DC IN LED
The power supply controller displays the power supply status through the Battery and DC IN
LEDs as in the tables below.
􀂉 Battery LED

If the DC IN LED off, follow the steps below:
1. Remove the battery pack and the AC adapter to shut off power supply to the
computer.
2. Attach the battery and AC adapter back again.
If the LED still off, follow the steps below:
Check 1 Make sure the DC IN LED goes on in Blue. If it does not, go to Procedure 2.
Check 2 Make sure the Battery LED goes on in Amber or Blue. If it does not, go to
Procedure 3.

Follow the steps below to check whether each connector has been connected correctly:
Check 1 Make sure the AC adaptor and AC power cord have been firmly plugged
into the DC IN 19V socket and wall outlet, respectively. When they have
been connected correctly, perform Check 2.
Check 2 Connect a new AC adaptor and AC power cord.
• If the DC IN LED does not go on, go to Procedure 3.
• If the battery LED does not go on, perform Check 3.
Check 3 Make sure the battery pack has been correctly installed in the computer.
If the battery LED does not go on while the battery pack has been installed
correctly, go to Procedure 3.
Procedure 3 Replacement Check
The system board, power supply board, or CPU may be faulty. Disassemble the computer
according to Chapter 4 and follow the steps below:
Check 1 Replace the power supply board with a new one. If the battery pack is still
not working properly, perform Check 2.
Check 2 Replace the system board with a new one. If the battery pack is still not
working properly, perform Check 3.
Check 3 Replace the CPU with a new one.

Toshiba Satellite 1900. Laptop loses power and shuts down without warning.

This email I received from one guy last evening. He had a problem with DC jack on his Toshiba Satellite 1900 laptop and fixed the problem by resoldering the DC jack on the system board. The problem is very similar toToshiba Satellite M30X, M35X, A70 and A75 power jack issue.

I finally got around to using the guide you provided to try to solve the problem on my Satellite 1900.
The power plug kept not making contact somehow and ultimately it would shut down.
You would see in the Toshiba Power Management Utility in the Battery Power Meter, the charge bar would show “Online Discharging”, which doesn’t logically make any sense anyway.
If you wiggled the plug at the back of the laptop it might make a connection but could fail at any time with no warning if you weren’t paying close attention to the red/green charge light on the front edge of the laptop and discharge the battery.
I took it apart and discovered that the barrel power socket on the back of the unit that is soldered in to the motherboard had over the course of time worked the centre post contact loose and pulled away from the solder.
There is no real anchor for the socket to the motherboard or anywhere else on the case plastic. The solder on the motherboard that holds the socket in place is very weak, there is not much there at all.
Over the course of normal use, and being a laptop people trip over the power cord from time to time adding to the stress of the almost non-existent solder.
All I did was to re-solder the damaged connection, and I beefed up all of the other three solder points on the motherboard as well to try to strengthen the contacts against failure in the future.

I have provided a picture that if you look very closely at the base of the pin as it goes through the circuit board there is a slight gap between the pin and the solder it used to be attached to.

I search all over the internet and the only resolution I could find for this problem was to have the motherboard replaced. It appears that is not the case. I repaired it 6 hours ago and it hasn’t failed since.

Toshiba Satellite A105 battery charging problem

Today I got Toshiba Satellite A105-S2712 for repair with the battery charging problem. It is a new model and we do not have a lot of experience with these laptops. The customer complained that the laptop will not charge the battery when it is plugged into the AC outlet.

The laptop failure symptoms:

The laptop will not turn on when I try to start it from the battery. When the laptop is turned off and plugged into the AC outlet the battery charge LED doesn’t light up. I know that the battery is not charged and the LED should light up when I plug the laptop into the AC outlet. The laptop starts fine when it is plugged. When I move the mouse over the Toshiba Power Icon in the lower right corner, the balloon will pop up and there is a line in there: Battery Remaining: N/A.

The problem repair procedure:

You can easily fix the problem just by updating the BIOS. Toshiba says that the BIOS version should be at least v1.30. So, go to Toshiba website and click on Downloads. Select your laptop model and find any downloads for the BIOS. In the BIOS change history you will see the description of changes.

After I updated the BIOS, the battery charging problem disappeared.