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1. Purchase a can of compressed air (Walmart)
2. Hold laptop upside down.
3. Spray the compressed air at the keys starting at one end.
4. Keep moving the flow of air from one end of the keyboard to the other in sweeping motion.
5. This should clear out any trapped debris.
6. Repeat if necessary.
Go to this link: http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-4UYM3F. On that page is a PDF file which should cover your model. Look at the section called "Removing and replacing a FRU" (Field Replaceable Unit). Look at the one for fan assembly removal. It references other sections that are necessary to get the fan out. When done, just reverse the steps. If you're not comfortable working with small parts, have someone else do it. It's just like working on a desktop, only smaller, more delicate, and there's no consistency between manufacturers.
Maybe not. Find the FN key. It is usually BLUE in color
Then look on TOP row of Computer keyb (or all over) and find CRT/LCD.
Press the FN and that key and your screen should come back. You accidentally sw. it to CRT (outside, external monitor)
This is a commin IBM issue fans going Bad ... to try and free it if it's just dust you can actually blow into the vent with compressed air and free up the Fan ... The IBM T series all check fan before powering up.
The replacement is not too difficult to do.
The safest air is the can type to blow in there.
The fan cycling problem on the T23 series usually indicates a loose
solder or missing inductor which is usually on the underside beneath
the PCMCIA slot. If you replaced the mobo yourself you may have
flexed what is a weak solder joint loose - you will need to pull the
board and resolder this or have someone else do this for you. You
can sometimes get the laptop to start by flexing the assembled laptop
gently around the PCMCIA slot and if so then that almost always means
an inductor problem. You can find some photos by googling
(images) "T23 mobo" or "T23 motherboard".