Question about Lenmar 450W Power Inverter

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My power inverter stopped working after plugging in flourscent lights to the inverter. the power source is a car battery. i have used another inverter on the same battery and still works fine. i think i plugged too many lights to the inverter. how can i repair this?

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If you overloaded your inverter you may have burned out internal circuitry. It's not hard to exceede 450 watts. I don't think there is any way to repair your inverter that won't cost more than a new one. Have you checked to see if there is any overload protection on this unit I had one of these several years ago and I seem to remember ther being black button on the back that was a reset. Hope this helps. Thanks

Posted on Nov 13, 2010

  • space_cadet2 Nov 13, 2010

    there is a black button on the top to turn it on but that's it ='( do you have anything suggestions as to what brand of inverter i should get next time? do you know what internal circuitry goes out when overloaded? thanks so much for your help! =D

  • Jack Spooner Nov 14, 2010

    Sorry it took me so long to get back to you. I got your message and tried to answer but our computer had other ideas. We"re in rural area and they just got fiber optic system in and we have some issues . In answer to your question to the best of my knowledge the main issue is a printed circuit board that is not normally worth replacing. The best one I have had was a 1500 watt power max. I think I got it at northern tool and equipmeny. I don't remember for sure . Imade the mistake of loaning to a friend now they are both gone. Hope this helps you some. Thanks

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1 Answer

Can I hook a power inverter to a separate battery than my vehicle and use an outler from the inverter to hook a battery charger up and keep the battery powering the inverter charged?


Sounds good in theory doesn't it, but Mr Newton and his theories tell you why that won't work. You can't make power, by using that power to make more. Energy always diminishes, so it may work for a very short time. If you use an external power source to charge your inverter battery, it will certainly charge the other battery but not in an everlasting circle. Eventually, you will have two flat batteries..

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1 Answer

Lap top dark screen, with system working fine. plugged on external vga, it works.


90 percent of the time the problem is the Inverter.

An LCD screen cannot produce enough light by itself. It needs an additional light source.
A Backlight is the additional light source.

A Backlight is a CCFL.
Cold Cathode Fluorescent Lamp. (Bulb)
Similar to the Fluorescent lamps used in home and businesses, but on a MUCH smaller scale.
(General size is 3 to 5 inches in length, and half the thickness of a No.2 pencil)

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

An Inverter reduces the power coming from the laptop, for the Backlight.
An Inverter increases the power coming from the laptop, for the LCD screen.

An Inverter is a small circuit board located inside the Display Assembly, behind the Bezel, and usually towards the bottom of the LCD screen.

This is a typical example of an Inverter. It is NOT THE Inverter that you will need.
You have to match the Inverter to the LCD screen. has to be THE Inverter.

http://www.lcdparts.net/InverterDetail3D.aspx?ProductID=2432

Post in a Comment as to the Model Number, and LCVD screen size of your Acer laptop.
(LCD screen's are measured diagonally. From corner to corner)

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1 Answer

Plugged into rental mini van; powered up converter; light turned green; plugged in 2 different Dell laptops and both times light on converter went from green to red and lap top confirmed not receiving...


Try to measure the input voltage. If the Vans battery falls to less than 10.5 V it may stop converting. The battery should be charged well before using converter.

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1 Answer

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Inverter run on batteries sir, and if these batteries are not charged, the run time {the number of hours it will work} reduces.
S0, you will need to connect the inverter to a power source.Theses will allow your batteries to be charged and enable it to run for a long period of time.
Make sure your batteries are still OK.i.e working properly

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1 Answer

Overloaded my inverter -now only works when hooked to car battery


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

After you have replaced the fuse, check the voltage again. 0.015vdc would not have powered anything that in manufactured to operate on 12vdc.

When powering anything over about 250W, I would suggest connecting directly to the battery to avoid overloading the lighter circuit.

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1 Answer

I am working on a Samsung SyncMaster 170MP. When plugged in the green on/off power button light flashes continuously and the screen never comes to life. I've tested the power brick and the outputs (14V @...


It sounds like it since you have the 14v going to the inverter. Repairing inverter boards even on lcd's is 50/50 shot, so let's give it a go. If you have a dvm check the ohms on the inverter xformers ( if more than one) they should be identical in resistance. Check or replace all electrolytic caps on the board. That's about all you can do outside of replacing it, Oh, see if you have a 5v source going to in inv. bd also, check that.

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Problem with getting inverter to work...


Inverters works from 12v carr battery or backup battery, you can not charge the inverter you msay killed your inverter if you connected to 120v wall mount...you use the inverter to give you AC (electric) from 12v battery. if your tv is 12v you need to know how much needed to get the correct connrection as output and input.

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Power Supply How To


Because inverters operate from a DC (Direct Current) power source, usually a battery bank (one or more batteries), the battery source will have to be recharged at some point. (Remember that a battery discharged more than 50% is probably close to being dead.) Most cars and trucks recharge their batteries from an onboard alternator. Depending on the inverter load and runtime required, most power use applications will be covered by the charged battery, augmented by the operating alternator supplying a continuous charge to the battery. If the load is large (air conditioner, large draw power tools, large microwave, food freezer, ice cream machine, etc.), the user should verify that the installed vehicle alternator is of large enough capacity to operate the vehicle's power requirement as well as to fulfill the capacity of the inverter load. If it’s not, a motor throttle installation may be required to carry a small load, a larger alternator may be required, or a larger alternator, battery isolator and additional onboard battery bank may be required in order to meet the power requirement of the large load. Remember: it takes 12 DC Amps (at 12 VDC) to run 1 AC Amp (at 120 VAC single-phase) of power because there are voltage and efficiency factors to take into consideration.

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3 Answers

Audiobahn Model AVM372DVD


more than likely the flourscent bulb is bad or the inverter is faulty. These act just like a ballast and bulb in flourscent fixtures. These parts are easily obtained but a headache to change.

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1 Answer

Princeton Digital VL1916


In my years of working on LCD's, your inverter (basically like a ballast in a flourscent lamp) is bad/going out. Crack open the case and look for a big pink and white wire going to a pcb (usually located under a shield) and remove it and check for puffed capacitors. If there are some change them and that usually fixes the problem. If there are no signs of anything wrong on the inverter, get the numbers off the pcb and google or ebay the numbers, usually youll find a replacement realitively fast.

Sep 15, 2007 | Princeton Digital VL1916 19" LCD Monitor

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