SPS1 charging system

Mine works when plugged in, but dead when not plugged. Found fuse, subtly hidden in lower part of AC power receptacle; pried out with small screw driver. Looked good & passed ohmmeter check. I loved the beast when it functioned. It spent a year in the garage; it didn't work when I brought it in. Charge light on for 8 seconds after plugging in, then off.

Problem description:The battery charges only when the laptop turned off. The battery charge LED lights up as normal and the battery gets charged to 100% while the laptop is off.
When the laptop is turned on, the battery charge LED goes off even if the adapter is still plugged in.
Possible cause:1. AC power adapter failure.
2. Battery failure.
3. Broken/loose power jack.
4. Motherboard failure.
Possible troubleshooting steps and repair solution:1. This problem could be related to a faulty AC power adapter. It's possible that the AC adapter doesn't provide enough power when plugged into the laptop. To find out if this is your problem, you'll have to test the laptop with another working adapter.Replace the adapter if needed.
http://www.chargerbuy.com/replacement-acer-aspire-9400-ac-adapter-19v-3-42a.html

2. There is a slight chance that you have bad battery. Test the laptop with a know good battery and replace the faulty one if needed.

3. The battery charge problem could be related to the power jack. Maybe the jack is broken or not making good contact with the motherboard. It is necessary to remove the motherboard and take a closer look at the power jack. Resolder or replace the jack if needed.

4. If the power jack is in a good working shape and new power adapter with battery do not fix the problem, most likely you have a faulty motherboard. Replace the motherboard if needed.

You have a bad or loose DC connector on the system board:

Symptoms of a broken power jack
1. If you wiggle the power cord or the AC Adapter connector on the back of the laptop, the power LED and battery charge LED start to flicker.
2. Battery will not charge in the laptop.
3. Laptop runs fine off a charged battery.
4. With the AC Adapter connected the laptop appears to be dead.
No power LED or battery charge LED activity.
5. Laptop randomly powers off without any warning.

If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

The battery life for these lights are for about 2 years at the most if left uncharged. The best way to determine if you need new a new battery or batteries would be to dismantle the light, remove the batteries and check the voltage with a volt meter. If they are dead, you may be able to fine a suitable replacement at: http://www.batterymart.com/c-04-12-volt-sealed-lead-acid-batteries.html

Defective AC adapter

here you may get the answer.

If the system will not power on, and the LED on the AC adapter goes out when plugged into the system, then the most likely senario is the motherboard has failed. Remove the battery, Wireless card, Drives, RAM and connect the AC adapter see if anything changes. If no change, the MB is most likely bad.

Normally, one of 3 causes.  

1. Dead Battery
2. Bad connection of battery interface on Motherboard.
3. The AC Adapter sensing pin (In the center of the plug) is damaged (If the system cannot sense the AC adapter, the charging circuit is disabled.)

Troubleshooting:

1. Try a different AC adapter (Any Dell D-Series system adapter is interchangable)
   
2. If no difference, then next is replace the battery.  (The battery on a portable is a consumable item, and the battery life is generally 300 to 500 recharge/discharge cycles  around 18 months)
3. If no change with battery or AC adapter, then the failure is the charging circuit of the motherboard.

If you have the AC adapter plugged into the portable, it will run on AC power while recharging the battery. Once you remove the AC adapter, it will go onto battery power.

If once you remove the AC adapter the computer dies, with a battery installed, then your battery is weak/dead or there is a connection problem, and the battery is not charging. But, I doubt this is the case, since it thinks the battery is at 80%. The system does not know if the battery is holding a charge.

You power settings are only timers, which reduce power consumption when idle.

electronics should not be relied on to realy confirm u need to use a second battery pack to connect ur printer n see if the same thing will occure. i guess the battry inside d pack may be dead even though its a new one.