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Power sometimes does not work.The led power light comes on and

Off about two or three times (flashes) then no power.Other times it will work just fine. please can you help.

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  • thebonemart Feb 06, 2009

    yes tried this not the problem

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Have you tried to change your power options on your control panel?

Posted on Jan 31, 2009

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Sceptre 32 inch tv takes about 3 min. to power on and sometimes don't power on at all


Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/

It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Jun 14, 2016 | Sceptre X322bv-hd 32" 720p Hd Lcd...

1 Answer

The model of the BENQ Lcd Monitor is FP783 When I open the Monitor it is working around half an hour later on the screen become black but the the led is remain on. If you wait the screen never come back...


There are two boards that I would be checking, the power supply often has bulging capacitors that need to be replaced, the second concern is the inverter board has usually two three that need to be addressed, 'very common problems" the inverter energizes the back lights.

Jan 31, 2011 | BenQ FP783 17 IN LCD WEBCAM/SPK Monitor

1 Answer

Power light flashes continually but monitor will not work. I leave computer on at all times but turn monitor off. I did that last night but today it was flashing and won't come on or off. I tried turning...


Yes. Flashing LED with no image on the screen is the first sign of the power supply gets overloaded. That may be caused by blown/shorted electrolytic capacitors. Open the monitor, take metal lid off and observe for those caps which are rounded on top. Replace them with proper ones.

Sep 11, 2009 | Acer AL1916W 19" LCD Monitor

3 Answers

Blank screen, flashing led power light


this sounds exactly like what happened to my 2232BW. I took screenshots of the fix and posted them on my webpage:
http://www.alexdemo.site90.com/#samsung2232bw_fix

Jun 03, 2009 | Samsung SyncMaster 2233BW 22" LCD Monitor

1 Answer

Benq FP71G+ 17" LCD with Power Recycle (shutdown & return).


Seems either aproblem with Invertor board or Front panel switches are leaky.
Samir

Aug 17, 2008 | BenQ FP71G 17" LCD Monitor

1 Answer

Monitor keeps blank even the power lLED is on green


Try replacin a new display card. If it is fine working.ok
If not try fixing for cold solder in the video section.
I suggest video section according your report the light green LED lighted that shows the power section is doing fine.

Apr 22, 2008 | Proview PL913S 19" Flat Panel LCD Monitor

1 Answer

Green led light flashing on 700p proview flat panel and no picture


Any high switching power supply of the same voltage and amperage rating will work for you. You may have to cut the end off of your old one and wire it to the new one to make it work but don't waste your money buying a specific power supply.
Good Luck!

Feb 16, 2008 | Computer Monitors

2 Answers

Green led light flashing on 700p proview flat panel and no picture


Usually when the power light flashes and the screen remains blank and unlit, your power board is in fact malfunctioning. This is not always the case, as the problem can sometimes reside in the input or inverter boards. I would first recommend that you feel comfortable with opening up your screen and looking at components. It can be a little overwhelming at first. BEFORE PROCEEDING, UNPLUG POWER TO MONITOR. If inclined to check, carefully open the casing around your screen. I have not worked on your particular model, but some are easier to open than others.

Once opened, you need to gain access to the circuit boards. Sometimes they are not protected by metal, other times they are completely encompassed. The flashing power light usually indicates that a capacitor(s) is(are) malfunctioning. To see if this is the issue, locate the power board (usually the one with larger-size components) and look for any capacitors having bubbled or raised tops and/or oozing a brownish liquid. If not on the power board, look elsewhere for the same symptom.

PLEASE BE CAREFUL!!! If you have recently had your monitor plugged in, the larger capacitors can still carry a charge. If you cross the leads of a capacitor while it carries a charge, it will discharge. It won't hurt any other components, but if you cross the leads with something that is in direct contact with yourself, you can get quite a jolt! There is usually a large voltage capacitor (normally just one) on the power board of these screens. I tested one with a multimeter after immediately unplugging it, and it still held a 166V charge! So please, do this with caution.

If a bad capacitor has been found, simply remove the old one and solder a new one in its place!

Nov 26, 2007 | Computer Monitors

2 Answers

Works for a few minutes then shuts down


You both have a collection of dry solder joints and or bad capacitors. Check for any sign of buldging capacitors on the power supply board and replace as needed with the exact same values.
The dry joints in the solder are normally around the larger items on the board like transformers etc and places that alot of heat builds up. Check the regulators and other area's near there, and also check areas that sit above them when the monitor is in normal operating mode..hot air rises..too bad electrical engineers work on flat screens =)

Good luck to you both.

Apr 27, 2007 | Dell 1503FP 15" LCD Monitor

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