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DELL monitor turns on ,stays on for 10 sec with good vga picture then turns off. Replaced 2 capacitors in power supplies -both were low (470 mf nominal) still the same problem...

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If you haven't already, on the bottom task bar, click on the ;power icon and see what your settings are

Posted on Feb 28, 2008

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Screen is grey with dots. No message. Originally stalled on picture. When restarted only grey withe dots came up. Humax only 18 moths old


The later build Humax products have some first models good and now oft poor ventilation slots that is better to open secure to release better the warmth. first

Second is the power supply capacitors there are not much capacitors insite that braun power supply i have today repaired a humax 5000c look the pictures the vent slots are now open and 6 capacitors are replaced (only neccesary for power supply) what was 10 v is now 25 v and 25volt are now 35 volt parts 680 mf replaced for 1000mf 82 mf for 100 mf
Thats all what is neccesary to repair the humax POWER SUPPLY


BUt if that your model is not 24 months old you will have warranty on hidden defects because its to young . because it could be another defect but 88 percent its the powersupply .
screen-grey-dots-no-message-originally-1qdoze13qaf2ub3rdgsrkkuk-2-0.jpg

screen-grey-dots-no-message-originally-1qdoze13qaf2ub3rdgsrkkuk-2-1.jpg

Apr 21, 2016 | Humax Televison & Video

1 Answer

FPD2275w monitor monitor powers on but shuts off after 1 sec shows a picture perfect before it goes black all buttons light up and stay lit sounds like they r working


This model will likely have 2 or 3 bad capacitors in the power supply. You can see the tops bulging. They are 1000Uf @ 10 volts.
Monitor Mike

Aug 20, 2010 | Gateway FPD2275W LCD Monitor

1 Answer

Nov 21, 2008 - I have a proview 19" LCD TV PA-19DK5. In the last few days when I turn on the tv the picture appears and disappears after 1 sec. audio is fine, when I use my xbox 360 through the component...


Please post the pictures, that will help. Do find any fuse in the inverter circuits, if you do have 5v (for logic) and 12v (for backlights), then may be the power supply is OK but I am not sure that the inverter is using 12vdc since you have some caps rated at 35vdc, Iwould expect the inverter to be using 24vdc for backlights. See some of the pictures I posted here: http://s807.photobucket.com/home/budm/allalbums

Jan 11, 2010 | Proview PL913S 19" Flat Panel LCD Monitor

3 Answers

I have same problem


Replace the following capacitors:

3 pcs - 220 microF - 25v
2 pcs - 1000 microF - 25v
1 pc - 2200 microF - 25v

Resolder the 2 transformer legs for the inverter.

Roan
Triangle Tech Whiz.

Jul 23, 2009 | Acer AL2216W LCD Monitor

1 Answer

Westinghouse LCM-19V7 powers on, but picture only stays for a sec


It's probably bad capacitors on the power supply board. These monitors are notorious for having the electrolytic capacitors blow out; cheap components! I would suggest replacing the two 1000 mfd capacitors and the three 220 mfd capacitors with 35 volt components from Radio Shack. That fixed one of my LCM-19V7s but not a second one which seems to have some other power supply problem.

Mar 24, 2009 | Westinghouse Computers & Internet

1 Answer

Optiquest q20wb Screen goes blank after powering on


I'd like to report a success story. I had this same problem with my Q20WB. It sat for over a year in my garage. I eventually bought replacement capacitors, soldered them in, and now it works. You can find kits with the right capacitors preselected, or if you feel like it you can also buy them individually.

good luck

Mar 02, 2009 | ViewSonic OptiQuest Monitor

3 Answers

Gateway fpd1530 15in flat


There are more than one inverter circuit for this model. One is prone to have poor solder connections in the transistors Q8 & Q10.
Another can be repaired by replacing 2 1uF electrolytic capacitors near the center edge of the board between the lamp sockets.
Monitor Mike

Nov 15, 2008 | Gateway FPD1530 15" Flat Panel LCD Monitor

2 Answers

Liquid Video monitor goes black after 30 seconds


Capacitors on the power board inside the lcd monitor have blown they can be replaced with new ones and the monitor should return to normal operation.
service center or if you feel capable you can do it your self with a soldering iron and the correct caps that have blown you need voltage and micro faradays usually 25 v at 470 mfd (u)however monitors use different kinds and voltages can be different it will be marked on the side of the damaged capacitors.
l8r

Nov 11, 2008 | Computers & Internet

4 Answers

About the VL2018W (BLACK) Monitor soultion you posted


You need to replace 6 capacitors on the power supply board. Princeton uses CapXon brand capacitors which last about 1 to 2 years before going bad. CapXon are extremely poor quality capacitors, saving Princeton 10 to 20 cents per monitor.
This is the list of capacitors you need to replace. If they aren't bad now, they will be.
qty 2: 1000uF, 10V (DigiKey 565-1646-ND)
qty 3: 470uF, 25V (DigiKey 565-1677-ND)
qty 1: 470uF, 10V (DigiKey 565-1643-ND)

You can get United Chemi-Con replacements at DigiKey. The DigiKey stock number is listed on the above list. Since DigiKey didn't have stock on the 470uF, 10V at the time I ordered, I substituted a 680uF, 10V (DigiKey 565-1644-ND) which is a larger diameter, but will fit in the area provided.

Apr 08, 2008 | Princeton Digital VL2018W Monitor

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