Power my Presario R3240us has had the battery replaced (recently) and the ac power supply replaced but even with the power cable attached the laptop continually runs on battery power only and on occassion will show where the ac power adapter is charging the battery. After a certain length of time the battery icon reappears (more often than not) and will work until the battery drains. The ac adapter only minimally charges the battery.

You need to print this out-on someone else's computer. Hope it works for you!
Remove the battery and charger/ac adapter/power cord from your Compaq Presario F700 laptop, press and hold the power button for 20 seconds to discharge any residual current inside the Compaq Presario F700 . This clears your RAM and is like a hardware reset. Replace the battery and charger/ac adapter/power cord and turn your Compaq Presario F700 laptop on.

Boot in "safe mode". As it starts up press F8, the computer ask you if you'd like to start in safe mode. Highlight "safe mode" and press enter. See if your laptop is booting up ok .

If your Compaq Presario F700 boots ok, do the following,

Try System Restore first,
Start Menu->All Programs->Accessories->System Tools->System Restore. Choose the most recent date before you the encountered problem. If it doesn't work, try the next date.

If System Restore does not fix it, as a last resort, you might need to fdisk, reformat your laptop hard disk clean and reinstall OS, that usually fixes all bugs. Before going that route, try following,

Uninstall unnecessary programs and applications.

Scan with a antivirus program

Scan with a spyware/malware program

DEFRAG C:

CHKDSK C:

Clean up and repair registry problems with registry repair software of your choice

If the problem persists, did you check if it could be your Compaq Presario F700 laptop power cord or power source problem? Defective or insufficient power supply might cause error messages that are misleading. Take the battery out and power on your laptop with the charger only. Make sure your Compaq Presario F700 power jack and charger plug tip are securely connected. Did you notice the power jack loose? You can find laptop power jack on ebay. Fixing and soldering the power jack requires professional skill though. The charger green/blue LED should be on. If not, replace the defective charger. Compaq Presario F700 laptop battery charger, especially its power cord/cable, lifespan is limited and does not last forever, consider buying a lifetime warranty charger online from company like www.topmic.com

HI,
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regards
Mark

1. Remove battery from the laptop. 2. Unplug the power cord from the computer. 3. Let the computer sit for a few min. 4. Leave battery out. 5. Connect power adapter to computer 6. Push power button to turn computer on. 7. If computer powers on shut down again, and put battery back in. 8. Push power button to turn computer back on (at this point battery and power adapter should be connected to the computer)
If computer powers on with power adapter with the battery out. You are having a battery issue. You would want to look into replacing the battery. If computer does not power on with just the power adapter. You are most likely having a power issue. Depending on how old the laptop is. You will either want to contact the manufacturer. Or take the computer to a computer repair shop, or consider replacing the laptop.

Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp

Power battery store supply good HP laptop ac adapter of 90W/100W.

Sounds like a ram chip, they can be found on the bottom under the ram access door.

Sometimes one of the ram chips are under the keyboard.

Hi,
Yes, it should run off AC power even if the battery is removed. Sounds like either the motherboard or your AC adaptor might be failing. I would start by trying the AC adaptor with another dell to verify it it's not dead.

Good luck,
Raf

Do power drain

step 1: remove battery and ac adapter from your laptop

step2: hold power button for 30second-1minute

step3: now put back battery and ac adapter

step4: now power on you sud be on


give a try hope it helps u

eather you have one or a couple of the following problems,

1. you have a bad battery
2. the power supply is defective
3. the charging circuit in the laptop is defective and the motherboard will require replacement or repaired.


Dennis

Compaq Presario V2000 seems to have intermittent problems with its power supply . In any case check out to see if there are any strange noises from your harddisk which you can hear if put your ear close to the laptop after switching it on .