When the power ON is keyed, the battery charging LED flashes (Even when not connected to mains power) and turns off after few seconds. I've checked the battery, it shows full charge. The laptop was working fine, and was switched off normally the last time. Removing the battery out and re-trying to switch-ON using mains power gives the same result.
Request for urgent help and advice from all who have encountered a similar problem.
Had the same problem with My Compaq M700 No Boot Or Post. Battery Light Flashes 8 Times, Have to Wait 24 to 48 hrs sometimes longer to get Laptop to Start. Tryed the DC Converter Board Change No Difference same Problem. Noticed When Laptop Did Start Clock Time Was always a Little Off 2-4 Hours sometimes more. So Figure CMOS Problem With Time Issues. Read About Battery Memory Transitor Voltage spike Detection Issues Corrected With Newer Bios Flash at HP Supports. So I Flashed Bios With Latest 686h. During the First Boot After Reflash Battery LED Did flash No Start, After pushing the power button again it Started. And has Every since.So Far Laptop Now Boots Everytime and CMOS Checksum Seems To Keep Time Correct In Windows. The Bios Flash Corrects a Voltage Spike Detecting Transistor In The Charging Circuit. During First Start after flash Bios will run system test on the charging system and Correct CMOS. Worked for Me Hope this Helps a Few.
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I'm not understanding what the problem is. If the battery is dead, and you remove it, how do you expect it to recharge? Why would you remove it? So, you take it out and nothing happens.So? What were you expecting to happen?
Before you do anything more, read the documentation that came with your laptop to learn how to care for your battery. The amber light usually blinks with the battery is running low. When you plug in the A/C adapter, the light usually becomes steady to indicate the battery is charging. At tleast until you remove it.
I'm copying someone else's answer; I can't vouch for it. emove the main battery and mains power supply, hit the power switch to
drain any retained charge. then remove the cmos battery and short out
the contacts. the cmos battery is on the right under the panel at the
top of the keyboard, which can be popped out by gently levering it up
at the edges. the key board can then be folded clear, watch for the
ribbon cable under it that connects to the motherboard.
When you power your system up do you get a message saying battery charge failure or some other disappointing driver message? Try powering down, removing the battery, and look for a little button on the underneath of the battery. You should be able to press this button and a series of lights will or won't appear. If they light up it means the battery is truly charged. If not there is something wrong with the connection. Try wiping the surface off and replacing the battery. Also make sure the pin that you place into the laptop to charge the battery is free of dust, etc.
There is a dimmer function that is part of the keyboard on most notebooks. You use the Fn key and some other key (Mine is F1 and F1) Look for what looks like Sun in blue print on the key. You should find 2 of them. One will be the brightness up and the other brightness down. You can try those.
More likely, something has come loose internally.
1. It could be the backlight for the screen is broken or a connection loose. You should be able to see the light when you look at the side of the display.
2. The AC power connector may have been broken and the notebook is only on battery power. By default most systems are dimmer when on battery power. Check to see if your charge indicator light is on. If not, that may be the problem.
It could be just a coincidence...but lets try a few things...
Remove the battery and unplug from the wall. Hold the power button on...and then plug back into power...after 8 seconds release the power button. Once your computer boots to desktop...shut down...and replace the battery.
Changing the harddrive should have anything to do with teh battery...
See if your battery starts charging after this trick.
Always start with the simplest solution first so start by cleaning all the contacts, AC adapter laptop plug, laptop socket, laptop battery contacts and battery contacts.
How have you confirmed power output from the AC adapter? have you used a voltmeter to ensure you are getting power at the laptop end?
Have you used a voltmeter to test the battery?
Assuming you have tried all this don't forget that almost any component can interrupt power on some laptops, however you're 2 main culprits with this kind of problem are usually power controller (voltage regulator) and in some cases, on a laptop of this vintage, the charge controller built in to the battery.
Try it with a different battery if you have one.