Question about IBM ThinkPad T40 2373 Notebook
This is a known issue with the T40 series. I have the same problem. It's a result of a manufacturing defect introduced through a new soldering process Lenovo used on this series. Basically, they baked the motherboard in an oven instead of soldering the components on one by one. This resulted in many of the graphics chips not fully connecting. After normal use, a corner can pop up, causing the screen to go blank if you move, lift or jostle the laptop.
As far as I know, Lenovo doesn't offer any fixes for this. If you wish to risk it, you could try soldering the loose corner yourself. Some people found a wedge works well. I stuff carboard between my keyboard and the chip to keep it down. Other people hve been known to use post-it notes.
Posted on Nov 24, 2008
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Posted on Jan 02, 2017
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3. Unscrew the hard drive cover. Grab the hard drive tab and shift the hard drive to the left to unplug it. Lift the hard drive out of the bay.
4. Unscrew and remove the PCI memory cover, the optical drive cover, and switch cover.
5. Unscrew the two screws that hold the keyboard to the base, these are located in the middle of the rear panel. Flip the laptop over so it is right side up, open and remove the keyboard by using the keyboard release switches located above the keyboard. Next, unplug the Toshiba Satellite U205-S5067 Fan cable.
6. Close the laptop and turn it over so it is bottom up. Unscrew the display assembly screws located under the laptop screen hinges. Turn the laptop over so it is right side up. Open the laptop and unplug the display assembly cable and disconnect the wireless antenna from the display assembly. Unscrew the display assembly from the laptop base and remove.
7. Unplug the mouse pad cable. Turn the laptop over so the bottom side is up and unscrew the base screws which are located along all four sides of the laptop base. Gently remove the base of the laptop.
8. Turn the laptop over so it is right side up. Unplug the fan cable from the circuit board. Unscrew the screws holding the Toshiba Satellite U205-S5067 CPU fan assembly to the laptop. Lift the fan assembly out of the laptop.
9. Insert the new Toshiba Satellite U205-S5067 CPU fan assembly into the lap top. Screw the assembly unit to the lap top and plug the Toshiba Satellite U205-S5067 CPU cooling fan cable into the circuit board.
10. Reassemble the laptop by repeating the previous steps in reverse order.
Hope this helps.
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