That could either be a problem with the AC adapter or the motherboard.
You can try updating the firmaware of you motherboard first. Go to this link:
http://support.dell.com/support/downloads/driverslist.aspx?c=us&cs=19&l=en&s=dhs&ServiceTag=&SystemID=LAT_PNT_PM_D600&os=WW1&osl=en&catid=&impid=
download the BIOS firmware, save it on the desktop then run it.
Your computer will reboot while the BIOS is being updated, if you'll have the same problem after that, call Dell to get a replacement for your AC adapter or motherboard.
I cant update the Bios to A16 due to charger problem.
I booted in to windows xp n found that it was using the power frm the charger but it cant detect the adaptor while charging.
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Dells are picky about which charger they like. a non genuine charger may poer the laptop up, may not and will probably not charge it.
The issue I suspect you are having however, is a faulty DC jack ( does the jack feel loose in the charge port)?, or a faulty charging board circuit. If the jack is loose, you should get a new one soldered in.
Also with a multimeter set to 20 DC volts, check the output from the jack inner and outer terminals to see you are getting the right voltage
I have 2 Original charger and both work on my other Dell Latitude D600 perfectly...
The DC jack were still tight...
I would not attempt trying to hotwire this to the battery by bypassing the circuits and I.m not sure that this can be done, at least not with any measure of safety, at the least, you could burn a hole in your motherboard. in all honesty, this is at a stage where it needs looking at by a qualified repair technichian, or electronics expert who can trace the root cause of the problem.
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I have 2 Original charger and both work on my other Dell Latitude D600 perfectly... The DC jack were still tight...
I already updated the Bios to A16....
Btw if the charging circuit were out,can i bypass/modify the power jack to charge directly to the battery??
I cant boot the laptop without battery even with good charger.
I can boot the laptop with charger even with a faulty battery.
Whenever i take out the battery the laptop dies off even with a good working battery.
Looks like the laptop cant detect the charger so it need the signal from battery to work.
Any idea??
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