No power via batteries

This could be a loose plug inside the unit or it could be a circuit that is bad. If the plug failed it is from physical damage from something like tripping over it or heavy use. That can be repaired by replacing the plug. If it is something like a component in the unit on a board then it becomes a little more involved.

Try the following.
1. Remove battery and plug in the AC Adapter and check if it works
If yes - Battery is defective
If no - Motherboard Problem/AC adapter

2. Check the AC adapter LED indicator if its lighted or not(double check by a multitester)
If lighted - it works properly
if not - replace
3. Try to reinstall WINDOWS operating system by the use of the installer CD
4. Reformat your computer and install necessary drivers and applications

Thanks. Cheers!

Try the following steps:

1. First remove the battery from your LAPTOP and plug in the AC Adapter. Turn ON the Laptop without the battery. Check if it is Working:
If Yes - You need to change your BATTERY
If No - Try checking your AC Adapter
2. The AC Adapter has LED indicator which will light up if it is plug-in to a power source (outlet) Check if it is lighted:
If Yes - AC adapter functions properly
If No - Try replacing your AC Adapter
3. If the problem still persist you might have an a following hardware failure on the following component:
a. RAM - Memory errors - replace with same Memory SPEED or type
b. Motherboard defective - you need to replace your motherboard with a new one.

======================================
Please Rate. Thanks. Cheers!

diagnostic procedures as follows:
1. Turn off the computer and peripherals, and disconnect them from AC power.
2. Reseat each installed battery by removing it and then replacing it.
3. Turn on the computer. Does the green power indicator light up?
Allow one minute for the computer to initialize its components before checking for signs of power.
Yes. Continue to step 4.
No. Use the AC adapter to connect your computer to AC power. If the computer operates normally when using AC power, go to step 7. If the computer does not boot when using the AC adapter, see the previous subsection, "Total Power Failure When Using the AC Adapter."
4. Does the battery indicator flash amber or show a a steady amber light?
Yes. The battery needs to be charged. Go step 5.
No. Go to step 7.
5. Connect the computer to AC power, and fully charge the battery.
For instructions, see the topic titled "Charging the Battery" in the online System User's Guide.
6. As the battery charges, does the green battery indicator light up?
Yes. Go to step 9.
No. Go to step 7.
7. Is the battery indicator flashing green and amber?
Your computer may be in a hot environment. Charging the battery in this condition may affect the life span of the battery.
Yes. Continue to step 8.
No. The problem is resolved.
8. Disconnect the computer from AC power. Is the the battery indicator still flashing amber?
Yes. You may have a defective battery. Continue to step 9.
No. The problem is resolved.
9. Remove the battery, and press its test button. Is the uppermost indicator in the charge gauge of the battery flashing?
Yes. You have a defective battery. Continue to step 9.
No. The problem is resolved.
10. If a spare battery is available, fully charge it, and then install it in the computer.
11. Turn on the computer. Is the power indicator off?
Yes. Your original battery is defective. get a new battery replacement.
No. Call Dell for technical assistance.

if you need Dell latitude d620 Battery you can go to online shop

http://www.global-battery.co.uk
http://www.sales-batteries.com

here you can perchase high quality battery easily
good luck!

There could be a problem with the battery. A fast check to determine whether you have a problem with the power adapter, power cord or the laptop's battery is to turn off the laptop, remove the battery, connect the power adapter, turn on the laptop & see if it works.
If the laptop works directly from the power adapter with the battery removed, then the power adapter is good. In this case we can suspect that the battery is defective & needs to be replaced.

If this did not help, try disassembling the laptop & re-seating its main components like the memory modules, hard disk drive, CD/DVD drive, etc.

There are several simple indicator to determine the source of the problem. There are 4 major components involved, the laptop circuitry, contact terminal, AC adapter and battery. Every laptop has a LED light indicating if it is in the charging mode (without powering up the laptop). Start out with your laptop shutdown. Pull out the battery, then plug in the AC Adapter. See any LED light go on? Try again, the same procedure now with the battery plug in first, then plug in the AC adapter. See any additional LED lights go on? If there is no different, than the laptop can not detect your battery. If the AC adapter can power up your laptop, you can eliminate the battery (assumed brand new battery) & AC adapter. This only leaves you with the laptop circuitry & contact terminal. If your laptop can charge up your old battery or any battery, then it might be still the battery & contact. So, you try these procedure to reduce down to the "problem" component.

First follow procedure to try to reset the power.

1. Unplug the ac adapter. Keep ac adapter unplugged.
2. Remove the battery and keep the battery unplugged.
3. Hold the power button down for 15-20 seconds. (Nothing will appear on the display and none of the lights will light up.)
4. Release the power button and plug in the ac adapter ONLY. (Please note that a power indicator light should be lit on the ac adapter when it is plugged in).
5. Normally power on the notebook.
6. If the unit does not power on, remove the ac adapter and insert the battery into the system.
7. Plug the ac adapter back into the system, the battery charging indicator light will light up.
   If the battery charging indicator light does not light up, the ac adapter may not be providing proper power to the unit, and may need to be replaced.

The diagnostic procedures from the Dell User Guide are as follows:

Total Power Failure When Using a Battery
If an AC adapter is not connected to your computer, the computer's power source
is a battery. If the battery indicator flashes amber or is a steady amber, the
battery needs to be charged. If the battery is flashing green and amber, the
battery may be defective. To troubleshoot this problem, use the following
procedure.
1. Turn off the computer and peripherals, and disconnect them from AC power.
2. Reseat each installed battery by removing it and then replacing it.
3. Turn on the computer. Does the green power indicator light up?
Allow one minute for the computer to initialize its components before checking
for signs of power.
Yes. Continue to step 4.
No. Use the AC adapter to connect your computer to AC power. If the computer
operates normally when using AC power, go to step 7. If the computer does not
boot when using the AC adapter, see the previous subsection, "Total Power
Failure When Using the AC Adapter."
4. Does the battery indicator flash amber or show a a steady amber light?
Yes. The battery needs to be charged. Go step 5.
No. Go to step 7.
5. Connect the computer to AC power, and fully charge the battery.
For instructions, see the topic titled "Charging the Battery" in the online
System User's Guide.
6. As the battery charges, does the green battery indicator light up?
Yes. Go to step 9.
No. Go to step 7.
7. Is the battery indicator flashing green and amber?
Yes. Your computer may be in a hot environment. Charging the battery in this
condition may affect the life span of the battery. Continue to step 8.
No. The problem is resolved.
8. Disconnect the computer from AC power. Is the the battery indicator still
flashing amber?
Yes. You may have a defective battery. Continue to step 9.
No. The problem is resolved.
9. Remove the battery, and press its test button. Is the uppermost indicator in
the charge gauge of the battery flashing?
Yes. You have a defective battery. Continue to step 9.
No. The problem is resolved.
10. If a spare battery is available, fully charge it, and then install it in the
computer.
11. Turn on the computer. Is the power indicator off?
Yes. Your original battery is defective


good luck

Hello there

Description.

When pressing the notebook power button nothing is displayed on the screen or display. The cause of this problem may be a failed AC adapter, the memory modules (RAM) need to be reseated or a failed notebook system board component which will require an HP certified repair.

Below steps will assist in identifying the cause of the problem and suggest the best solution. Test the AC adapter Follow the steps below to determine whether the problem is related to the AC adapter or your notebook system board.

1. Remove the battery and disconnect all external devices from the computer.
2. Hold the Power button for several seconds, with all power sources removed. This drains residual power from the system, and may correct many problems.
3. Connect the AC adapter to a wall outlet and plug the other end into the computer.
4. Press the Power button to start the notebook PC.

If the notebook does not start or the display is blank then check the power indicator light or power socket LED. Check the power indicator light or power socket LED On newer models of notebook PCs, there is an LED or indicator light around the power socket on the notebook. Check to see if this light is on or off, when the notebook is plugged into AC power.The power indicator light or power socket light should turn on when the AC adapter is connected.

• If the light does not turn on then the problem is most likely related to the AC adapter or the electrical source in your home or office. Go to the Light does not turn on section on this page.
• If the light does turn on but the notebook does not start or the there is a blank screen then continue to the Light does turn on but the notebook does not start section on this page

The light does not turn on when the AC adapter is connected If the power indicator LED is off, the AC power adapter may need to be replaced. To determine if the AC power adapter needs to be replaced follow the steps below:

1. Ensure that the AC adapter is plugged directly into a known working wall outlet.
   NOTE: To check the wall outlet, plug in a different known working device like a light, radio etc.
2. Check all of the following connections:
   • The connection from the power cord to the wall outlet.
   • The connection into the power adapter from the power cord.
   • The connection from the AC adapter to the notebook power socket.
3. Press the power button again to test the notebook PC.

If the power indicator light still does not turn on, then the AC Adapter needs to be replaced. Contact HP Service and Support for further assistance. Power socket LED or power indicator light is on but the notebook does not start If notebook power indicator light (LED) is on, the AC adapter is working correctly. The problem is a result of a hardware failure in the notebook itself. In some cases, reseating the memory module (RAM) may solve the problem.

Follow the steps below to determine whether the problem is related to the AC adapter or your notebook system board:

1. Remove the battery and disconnect all external devices from the computer.
2. Hold the Power button for several seconds, with all power sources removed. This drains residual power from the system, and may correct many problems.
3. Connect the AC adapter to a wall outlet and plug the other end into the computer.
4. Press the Power button .
5. Is the Power indicator light (LED) on or off?

****If notebook power indicator light (LED) is on, the AC adapter is working correctly***
If the power indicator LED is off, the AC power adapter may need to be replaced. To determine if the AC power adapter needs to be replaced follow the steps below:

1. Ensure that the AC adapter is plugged directly into a known working wall outlet.
   NOTE: To check the wall outlet, plug in a different known working device like a light, radio etc.
2. Check all of the following connections:
   • The connection from the AC adapter to the wall outlet.
   • The connection into the power adapter from the wall outlet.
   • The connection from the AC adapter to the notebook.
3. Press the power button again to test the notebook PC.
4. If the power indicator does not turn on, remove the AC power adapter from the notebook PC and re-insert the battery. Then press the power button. If the power indicator light still does not turn on, then the AC Adapter needs to be replaced.

*****Reseating the RAM may resolve this issue.****
Step 1 - Remove the battery

1. Slide and hold the battery release latch to the unlock position.
2. Use your finger to lift the battery up and out.

Step 2 - Remove the memory module

1. Locate the memory module cover on the bottom of the notebook.
2. Remove the screw that covers the memory module.
3. Use your finger or a flat head screw driver to lift the inside edge of the memory module and remove it.
4. Push both tabs outward simultaneously to release the memory module.
5. Grasp the memory module by the edges and pull gently to remove it.
6. After removing one module, replace the memory expansion cover and then replace the screw.

Step 3 - Replace the battery

1. Insert the battery into the notebook.
2. Push the battery into the base enclosure until you hear a click.
3. Connect the AC adapter and turn on the notebook.

fter the memory is reseated, connect the AC adapter and turn on the notebook. If the notebook boots normally and the Windows desktop appears no further action is needed. If this problem re-occurs often, contact an HP Support Specialist to schedule a repair.