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What is flat monitor inverter - BenQ FP71G 17" LCD Monitor

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LCD screen totally white when turn on


The HP is a flat screen monitor used with many desktop computers. When the LCD on your HP monitor goes white, it is an indication that your monitor's inverter board has gone bad. The inverter board is a small circuit board that transfers power from the monitor's main circuit board to the LCD screen. Replacing the inverter board means dismantling the HP monitor.

1. Power down your computer and unplug the HP monitor cable from the back of your desktop. Disconnect the power cable from the back of the monitor. Relocate the monitor to a flat work surface. Place the monitor with the screen facing downward.

2. Remove the Phillips-head screws from the monitor's base stand and from the back cover. Lift the base stand off of the monitor and remove the back cover. Peel away the foil from inside the monitor around the internal circuit board.

3. Locate the inverter board near the bottom of the monitor's casing. Unplug the power cables from either side of the inverter. Loosen the Phillips-head screws from the inverter board. Lift the old inverter out of the monitor's casing and set it aside.

4. Place the new inverter inside the monitor. Replace the Phillips-head screws and fasten it in place. Reconnect the power cables to the connectors on each side of the new inverter. Replace the foil around the outside of the main circuit board.

5. Replace the back panel and base stand, and their retaining Phillips-head screws

I hope you find it very helpful.
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Aug 11, 2011 | HP Computers & Internet

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Dell 22 inch Wide E228WFP Analog Flat Panel Monitor monitor goes off and i have to turn on again and it may stay on for a good while and then sometimes i have to constantly turn it on over and over until I...


First place to check will be the caps in the power supply/inverter board.
http://www.lcdrepair.us/E228WFPc-inverter-power.html

http://www.lcdrepair.us/E2208WFPt-inverter-power.html

Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague

http://www.badcaps.net

May 04, 2010 | Rosewill R900J 19" Flat Panel LCD Monitor

1 Answer

I am powering up and the flat screan turns on and


More likely to be bad caps (bulging top/seal) in the power supply, which when they failed, they may have taken out the inverter fuse on the transistors in the inverter circuits also. See example of failed monitors due to bad caps: http://s807.photobucket.com/home/budm/allalbums

Mar 14, 2010 | Westinghouse 19" Widescreen Flat Panel LCD...

1 Answer

Dell monitor will come on but will not stay on. stays on 5sec


5 seconds? Hmm, too long for inverter driver turning into protection caused by bad lamps. Also too long for PWM controller in the switching power supply.
Rather looks like overheating of the FETs in the inverter, they are driving HV-transformers. Open the monitor, remove metal lid and observe inverter board. If PCB under and around these FETs is darkened, replace them.
These Dells hard to open. Take the foot off and unscrew plastic cover. Then using flat screwdriver with wide blade separate plastic halves of the case, starting from bottom edge and moving to opposite. It might be sweaty.

Sep 13, 2009 | Dell E173FPf 17" TFT LCD Flat Panel...

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MAG innovision 900w 19" LCD flat panel


Hi..there,
Well, you need replaced a new backlight inverter. if you got a AC Adapter with this monitor. The backlight inverter it to your left a small rectangle piece. Monitor without AC Adapter, the inverter it to your right... it's a large piece of power supply w/ buit-in inverter. OK! Wanna repaired it yourself...
First of all, inspecting the inverter closely...if you're lucky you can see a over-heated capicators with a bulged caps on top. Those caps need to be replaced. if you're not sure....just replaced all the caps.
Good lucks! Have a nice day!

Oct 08, 2008 | Mag Innovision 19" LCD Flat-Panel Monitor...

1 Answer

Flat screen monitor comes up with No Signal


If it goes to NO signal again, its not necessarily the whole Flat screen that is dead. Just replace the Video logic board with a known good one and it should work

Most monitors only have 2 or 3 boards
Logic board, Inverter, Power supply
or Logic video ,and a power supply board with an embedded inverter.

You have to open the monitor and replace.



Sep 13, 2008 | Computers & Internet

1 Answer

Inverter problem


1800652667 as soon as hurricane Ike gets done with Houston, Texas. Or www.hp.com/go/support

Jul 21, 2008 | HP Pavilion F1503 15" LCD Flat Panel...

1 Answer

19" Mag Monitor turns 0ff by itself


Hi...there,
All you guys need a new backlight inverter... Your old inverter are busted!

Apr 16, 2008 | Mag Innovision 19" LCD Flat-Panel Monitor...

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