Repairing a dell 17″ lcd monitor
Friday, November 19th, 2010 at
7:57 pm
I received this dell monitor for free because it would not turn on, I suspected a problem in the power supply circuit. I found 2 bad capacitor, I replaced them and now it works perfectly. It is a dell 1704fpt
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hey buddy, i got a lcd caps look fine, but that yellow square thing on the board is making a humming sound…………you got any tips ?
Thank you sooo much, My work just trashed 4 of these monitors and your video helped me get the first one fired up and working. I’m assuming the other 3 will be the same repair. This must be an issue with these dell monitors.
I only had 25 volt capacitors (I know you said you could go up in voltage) but I hope that’s not too much. Thanks again for your help.
hey! my pc monitor (actually it is not flatscreen) when i open it up it doesnt work and the green small light at the the right side down near the switch button just blinking fast but the monitor was not come on.. to open it up i just ill make it warm by using hair blower maybe i nid 10-15mins to open it up.. is like when its warm it easy to open but when is cold my pc monitor is hard to open… please reply.. hustle_barrex@yahoo.com
Ты бы руки для начала помыл, не стыдно? Кондеры у нас меняют школьники 3-го класса, проще наверно только батарейки в фонарике поменять))))
Dude, I kept having to fast forwarding this video because there were some parts where I about fell asleep. Your voice is so dry and you don’t show any excitement. I am not trying to be be mean, just some helpful criticism. Thanks for the video though.
thank you for your videos. The problem is i have replaced the capacitors in the power supply of a Samsung monitor (Power Board IP-35135B). I even replaced the ones that looked fine in case they couldn’t hold up charge anymore. Still no success. Back light still doesn’t lightup. I know for a fact its the power supply problem because i have tried it with a different known working one and the monitor lights up.
Do you have any solution? Could it be other problems such as transistors or coils?
@mjmcomputers It sounds like the something in the power supply isn’t working. Check to see if there are any input fuses that could be blown. Look for signs of anything burnt. It also could be a problem in the power button circuit. If you can find any model numbers on the boards that may help.
@mjmcomputers: Nope, no sign of life. I am thinking to try the new screen on another monitor. But that will only tell me if the screen is working or not.
@mindspring283 Does it light up or anything? If so what color is the power light?
I got a 19″ for free. Apparently looked like the LCD display was out as it had black burns on it. Ordered a new screen but still it’s not working. Maybe the power supply is out, but ALL capacitors look perfectly fine.
How can I check that the problem doesn’t lie in power supply board or the other smaller board next to it (as shown in your video)?
Thanks.
@mjmcomputers the computer is on.. but wen i tried to off d monitor then turn it on
the screen appeared but it will turn back into to Black…
@09278751957 is the computer still on? have you tried another display?
sir, jst wanna ask ..
wen i open my computer my pc turn ON,,, but suddenly Display Shutdown After Few Seconds To Few seconds…
wat am i suppose to do???
pls help
Respond to this video…Good Work! I’m really disappointed in the quality of lcd monitors. The old crt monitors held up so much better.
I have the HP vs19e with the same problem. replaced 3 of the caps and BINGO, it works!
@JuniperSprouts Thanks, yea sometimes I mark the board with a marker if the board is not already marked. Sometimes under the cap they mark the board with a circle with half of it colored white and normally that is the negative side (stripe side).
Very good video.
I like your calm, confident voice.
This is good for my soldering confidence. How do you keep track of polarity on the caps? Marker?
Thanks for posting. Excellent tutorial for someone like me who knows little about computer troubleshooting and even less about repair.
@mjmcomputers
They will still have a charge, I am talking about the giant rectifier capacitor, if u dont believe me, touch it
@hasan2222 Going up on the voltage of the capacitor is okay. Normally these small capacitors don’t hold enough voltage to harm you. They normally self discharge from the load of the components.
capacitors must be replaced with the same specs, specially the chimical ones, otherwise they might explode.
AND before u try to work with the ones on the board, try to short circuit them or they might burn ur finger if u touch both poles
also watch for the polarity of chimical ones, ITS VERY IMPORTANT
@Knaeckebrotsaege I’ve written posts before, then went to post and I’m 200 characters over, have to delete half my post. Maybe they should make an option for a long reply and a quick reply.
@mjmcomputers that comment about the general purpose caps was in general
the character limit for the comments is kinda annoying sometimes.. >.>
otherwise i would have mentioned that in my previous comment.
@Knaeckebrotsaege I’m registered over at badcaps dot net. I didn’t know that about the dell monitors. They actually seem to hold up fairly well as they are the majority of what I see in service. The caps I used are just as good or better than what was originally in the monitor.
good site with infos about the bad caps and lots of helpful threads on a ton of LCDs is badcaps net … their forum is full of solutions for fixing LCD monitors (not only with capacitor probs)..
by the way.. Dell LCDs (most of the 15″, 17″ and 19″ ones) are actually rebadged BenQ POS monitors.
and another BTW: replacing low-esr caps in a switchmode powersupply (like in LCDs) with general purpose ratshack crap isn’t gonna last long and may destroy even more..