If your laptop computer runs normally on compaq presario 1200 ac adapter, but the battery won't charge, please try the following troubleshooting steps:
1) Remove the battery from the system.
2) Look at the connectors in the bay and on the battery for signs of physical damage.
3) Check the battery charge by pressing the status button or image on the battery near the LED's. Note: The lights indicate the current amount of charge on the battery. If all the LED's come on when you press on the butto, the battery is fully charged. If fewer lights are lit, then the battery is partially charged. If any lights flashm or blinkm there could be a problem with the battery.
4) Reinsert the battery; puch until it locks into place and the latch snaps back to the locked position.
Have you already tried another charger?
SOURCE: Compaq Presario 1200 won't charge battery
dear N9YK
you can follow this
If you have a loose connection where you plug in the power on your
laptop, or it works intermittently, you could have a bad dc jack.
Symptoms
Why does this happen?
or you can check your dc amper in your adaptor
oke
thx
cropp
SOURCE: Compaq Presario needed a new battery was installed labtop will not charge up!
When you install a new battery and remove a battery always make sure the laptop is completely shut off and have the power cord removed so that you avoid any possible power surge.
Batteries generally don't last much longer than a year and I have found removing the power cord or battery when it is off to be a good practice.
Before you charge a battery make sure it is run most all the way down. Recharging a battery when it is not run down can give it a memory and you may only be able to charge it up to the point you started charging it.
Anyway, if the computer won't charge a new battery then you could have a bad motherboard. To be sure try another battery.
SOURCE: Please tell me where I can find a correct service
here is:
http://www.eserviceinfo.com/downloadsm/15926/Compaq_Presario%201200%20Series.html
click on download link
SOURCE: where is my modem compaq presario 1200
Compaq presario 1200 its a laptop and modem is inbuilt. If your laptop is in warranty then get in touch with Compaq. Do not try to change modem as warranty will get void. So donot try this at home.
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