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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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UPDATE: Dead Compaq Presario 1200XL Laptop/Notebook
Hi,
I found hundreds of postings regarding the Presario 1200XL series laptop with the same or similar problem as I have (see my original post below). It is my impression that one common cause of this problem is the flash bios going bad. It seems that somehow, there is a connection with a dead RTC/CMOS battery and flash bios!!! I replaced my dead RTC/CMOS battery (like many others did), but that isn't enough. I read several reports that stated the laptop was brought back to life after the flash bios was replaced, along with a new RTC/CMOS battery. My impression is the 1200XL series is a LEMON or this was designed into the system so the laptop last for as long as the RTC/CMOS battery? I am a TV, etc. service tech and I know that the contrast/picture setting from the factory is often set to maximum. The end result, this shortens the life of the picture tube, therefore reducing the life of the TV. Brad On Tue, 26 Feb 2008 12:31:53 GMT, in sci.electronics.repair you wrote: Hi, My Compaq Presario 1200XL laptop/notebook won't power up (dead). Note: I service TVs, etc. but not computers except my own. I checked the power micro switch (AOK). I removed the battery, then tried to power it up again the next day without installing the battery. Also, I used a bench power supply set at 19Vs as a sub for the AC adapter with the same results. I checked the 5 amp fuse on the mother board. When I press the power button/switch, there is absolutely no sign of a response (reason I checked micro switch). The only indicator that lights is the one that shows the AC adapter is plugged in. If I could get my hands on a schematic, that will be a big help. Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active keystroke logger (spyware) in your PC. |
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