Question about Black & Decker 750w Power Inverter

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Inverter not working

I had it connected to the car battery and it was working fine, I had gotten some static electricity from the inside of the car interior while vacuming, and had touched the vacumn and it shut off. I took vacum inside and it worked fine on 120v household current. Now the inverter doesnt work..the whine/shrill sound when you disconnect it from the battery is still there, but when I plug the vacumn into the inverter, it doesnt work....Any ideas?. there an internal fuse that can be replaced?

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Inverter is charging battery but if I switch on load button , It starts making noise loudly. can you suggest solution

Posted on Jul 01, 2010

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Posted on Jan 02, 2017

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unhook all usb cables and power cable, take out battery. Hold down Power button for 60 seconds, which will get rid of all static electricity. Plug in all cables again and check.

If still facing problem there will be some connection issue inside the lap.
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Hi I have Dell XPS M1210 laptop. When I turn on the screen nblinks for a second and then goes real dark. at first it look like its gone blank but if you look closly, the screen is on but very dark. I...


farooq473, replace the Inverter.

1) An LCD screen cannot produce enough light by itself. A Backlight is used to help provide the needed light.

2) An Inverter is used to provide power for the LCD screen, and the Backlight.

An Inverter boosts power up for the LCD screen, and lowers it for the Backlight.
90 percent of the time a bad Inverter is the problem.
A Backlight usually goes out all at once, Inverters slowly 'die'.

Dell Support > XPS 1210 Notebook PC > Service Manual,

http://support.dell.com/support/edocs/systems/xpsM1210/en/SM/index.htm

In the list click on > Display
Now click on Display Panel.

Dell doesn't show, and describe how to replace the Inverter.
When you click on Display Panel, you are looking at an exploded photo showing the Display Panel removed.
Scroll down to the next small illustration.
Has 1, 2, 3, 4, and 5 pointing to the Display Panel.

5 shows you a pull tab to release a flat cable from the Inverter. The Inverter is the small circuit board to the left of the pull tab.

This is not advertising for this website. Just an example to show you what the Inverter circuit board looks like.
(Screen Inverter)

http://www.battery-adapter.com/product_info.php/products_id/3450

This is Not a Dell XPS 1210 Notebook PC. It is a guide for replacing an Inverter in a Dell Inspiron 1525 Notebook PC, but I wanted you to have photos, and instructions for the basic procedure.
After you have repaired over 100 laptops, you'll realize that they all have the same basic procedures.
Just different parts.

http://www.insidemylaptop.com/replace-lcd-screen-inverter-dell-inspiron-1525-laptop/

3) Be SURE ALL power is removed from the laptop before you start.
Remove the AC adapter (Charger) and Battery.

4) You should follow Anti-Static Precautions implicitly. It would be best if you bought, and wore an ESD wrist strap. (Electro Static Discharge) Connect the alligator clip to a good ground source.
(For example, I connect to the metal frame of an empty desktop computer case)

The cost averages from $3 to $12.
A $3 ESD wrist strap will do just fine.
This is an example of an ESD wrist strap,

http://www.amazon.com/Cables-Unlimited-ACC-1400-Static-Grounding/dp/B000EDMPQK

5) Use a multi-compartment container for the various screws you will remove.
Label each container for the area the screws came out of.
You DO NOT want to mix them up!

You can use a clean egg carton in a pinch. Label each egg holder.

Have questions post in a Comment.
Regards joecoolvette

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1 Answer

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It sounds like the fuse that protects you cigarette lighter is blown.

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If your appliance draws over 300W or if your 12 v battery charge is low you will get a loud beep warning. Do you get the same beep with a low current appliance like a lamp? Make sure your battery has a good charge.

Some appliances have huge draw at start up even though they are rated under 300w your inverter may not be able to start.

Also some electric motors don't like modified sign wave inverters.
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I had my inverter beep when I had it connected via a cigarette lighter plug but when I used a connection straight to the battery it worked fine.
I was running a 500w grinder on a 1000w el cheepo inverter.

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