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The monitor fails to power up. green power button light flashes, theres a slight fizz when you turn it on and off. looks like the capacitors have leaked as they have expanded further than the normal shell can hold. need to know value of c707 kf 105c to replace this unit. i think that the caps need replacing within the system. just need the values of certain caps within the system.

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First what kind of monitor and model.
Second, don't use the monitor if you can hear and or see problems, have the unit repaired or replaced.
The caps are easy enough to replace if you have the savy.... With no model number I can't tell what kind of unit you have but if you mean C5707 and not C707, you have a Dell or BenQ monitor.
The C5707 is a 8 amp NPN transistor.
I have removed and replaced about 20 sets and used a TIP3055 which is a 10 amp rated.
You should have 4 to be replaced.
You also may have to watch what size the caps are, as if too long, they will hit the shield.
Good luck.

Posted on Sep 11, 2009

  • John Ray Sep 11, 2009

    First what kind of monitor and model.

    Second, don't use the monitor if you can hear and or see problems, have the unit repaired or replaced.

    The caps are easy enough to replace if you have the savy.... With no model number I can't tell what kind of unit you have but if you mean C5707 and not C707, you have a Dell or BenQ monitor.

    The C5707 is a 8 amp NPN transistor.

    I have removed and replaced about 20 sets and used a TIP3055 which is a 10 amp rated.

    You should have 4 to be replaced.

    You also may have to watch what size the caps are, as if too long, they will hit the shield.

    Good luck.

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The screen of the monitor is blank. The green power light though is flashing. I can hear a faint ticking sound from within the monitor. It is as if the backlight has just failed. The monitor have been...


The flashing power button is an indication that the power supply has failed. There are parts called capacitors that filter the output power and when they short out the power supply can't start up correctly os it tried over and over, this make the power light flash each time it tries to start up. The monitor is easy to repair if you can do a little soldering. Here is a link to a repair guide that will show you how to dis-assemble the unit and what to look for and replace to get it back going again. Te guide also has videos showing the steps.

http://www.ccl-la.com/blog/index.php/repairing-the-samsung-920n-920nw-monitors/

I hope this helps, if so please rate my solution.

BuddyMc

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I have a Dell 193fp monitor. It's 5 years old and is used infrequently. Today the Power button started to flash amber repepatedly while making a slight clicking noise. After turning it on and off,...


This sounds like the power capacitors are failing, which is not uncommon for a monitor of this age. You can take it to a TV repairman and get the offending capacitors replaced, however, the cost of replacement may outweigh the cost of a second hand monitor

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Two capacitors on my Viewsonic VG2021m popped so had them replaced, no others appeared even slightly dommed to signify they had blownm though the monitor still isn't working. Plug it in to the wall and...


Bad cap can look normal but can have high ESR, I always replace them in a set, and you should use LOW ESR type with 105c rating since we are dealing with switching power supply here. Look at the bottom seals also.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VG2021/

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm/

Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.
Or www.digikey.com just make sure to use caps with low ESR, 105c, high ripple current, long life rating such as PANASONIC FM or FC series.

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1 Answer

I have a problem with my l2046nv monitor. It turns on, flashes and stay dark, you can however see the picture but it's VERY faint (flash light helps). I turned it off and on.. it would turn on and show a...


Look for bad caps with leaking/bulging tops or seals first.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, 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.

Basic LCD monitor troubleshooting guide:
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://en.wikipedia.org/wiki/Capacitor_plague

Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

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Try it on another PC fIrst.
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

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1 Answer

Does not power up, however there is a slight


Its going to be either a problem with the screen or bulging pregnant capacitors.

A good capacitor will have a flat silver top. A bad capacitor will look puffy on top or the bottom or both and sometimes may even be leaking.

You'll have to get the back cover off to check for this. If you do find bad capacitors then you'll need to replace them with capacitors of the same UF rating and the same voltage or higher. You'll need to have some soldering skills to do this. Also make sure the marked part of the capacitor is facing the marked part on the board.

Now go ahead and hook the monitor back up, if it turns on and you get a self-test menu to come up then that means the monitor is fixed. If you still get a green light or you don't find puffy caps, then that means the lcd is bad and you'll need to get another monitor.

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Please disconnect the Monitor Data cable from Computer.
If you see Dell Colored bars, it means, monitor is working fine,
If still black, please ask for replacement, since Monitors have 3 years of warranty if not purchased with the computer.

Now connect the cable back to computer and turn the computer off by holding the power button on computer and turn it back on...

Blinking Green shows that computer is in sleep mode......

Hope this should resolve the issue.

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Pop goes the weasel...


Chances are a capacitor has blown. They normally make such lovely poping noises when they die.
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I would reccomend you get it to a repair shop sooner rather then later for a cheap simple repair rather then an expensive monitor replacement.

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