Re: U3011 power fault?
i will check tonight when i get home. i changed the capacitor on logic board.
hmm not sure on the brand.. i hope the capacitor is not from a bad brand. :X
ktzz
Member
Last Activity: 01-10-2015, 10:21 AM
Joined: 10-14-2014
Location: singapore
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Re: U3011 power fault?
i think it was one of the 470uf or rather the bigger in size capacitor. and some smaller size caps. to some i not sure but it is of same excat uf and volt.Leave a comment:
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Re: U3011 power fault?
this monitor is coming up with new sytmpton is really interesting. haha
yeah! i have two same monitor. oh yeah. before i install the new psu i didnt have this flickering line problem. hmmm oh yeah! i did swap out some capacitor. might be the new caps. cause this problem?
i swapped the tcon but not the cable.
yeah it was just randomly shutting down. oh no... i think changing the caps is like causing me more problem.Leave a comment:
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Re: U3011 power fault?
i see! what do you recommend for this? once again. im really grateful for your help and knowledge.
updates:
the flickering came back again. after the monitor became hot. i tried sliding it up and down. the flickering went off again. hmmm.Last edited by ktzz; 11-05-2014, 10:14 AM.Leave a comment:
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Re: U3011 power fault?
hmmmm okay. so does reflowing them helps? the solder on the board is kinda dull. or is there any method?Leave a comment:
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Re: U3011 power fault?
i tried my pc using another monitor. there is no such problem.
i tested the cable on another pc / monitor too. its all good.
hmm signal problem. is that the logic board?Last edited by ktzz; 11-04-2014, 09:06 PM.Leave a comment:
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Re: U3011 power fault?
okay i swap with another tcon board. the flickering is still there. so whats left should be the logic board. what causes it?
this is getting very weird. after sliding up and down the monitor. it seem to shake off something maybe. now the flickering is gone. but i think this is not a long term fix. anyone know of any reason? most of the web searches point to t-con board. but i already changed to another t-con board. and produce same flickering problem.Last edited by ktzz; 11-04-2014, 10:24 AM.Leave a comment:
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Re: U3011 power fault?
the display is okay for a moment after i found out some cables were loose. i guess i overlook it.they were great for a few days till suddenly some flickering horizontal line appear.
plug into another pc same thing happened
did the monitor self test all colors are great. red blue green grey black white. no flickering at all. what could have been the problem?
after reseating the cable again. only the left side seem to flicker. classical t-con problem?...Last edited by ktzz; 11-04-2014, 09:02 AM.Leave a comment:
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Re: U3011 power fault?
i think the pin although is NC. but there is a wire connect to the inverter for the backlight. i found out the backlight is still okay it will dim lightly then become brigther. something like when i start my monitor. same behaviour.Leave a comment:
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Re: U3011 power fault?
yes i did. the blue wire is put to the new nc slot. the voltage all seem the same even with the cap is the same. hmmmm
i only changed the wire location for the 24v_e and the nc. ignored the extra port on hdcr on both side.
able to off and on with beep. but not able to get image even with its own monitor menu. but there is still beep sound =/
any place i can start checking again?Leave a comment:
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Re: U3011 power fault?
okay swap out the old one with the new one. it powering up nicely. but problem is. there is no dell logo? and when there is no connection it does not turn orange. something i did wrong? i leave the hdcr away. then swapped the 24v_en from 3rd to 2nd.
and of coz there is no image. just backlight on. cant even see the menu. =(
does anyone know about it? man.. it just got worst. =\Last edited by ktzz; 10-30-2014, 11:31 AM.Leave a comment:
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Re: U3011 power fault?
i have not yet. just thinking if i swap the wire aroundd, will it be alight?
* okay i saw it. for the pwm and the hdcr is actually small matter as there is no wire connected to there. just the NC different position but pointing to same thing. is it safe to connect the blue wire into it? ( if u refer to my first few post on the blue wire, its for the nc i guess )
then right now i see no different in the 24v_en. can i just swap them around for the wire?Last edited by ktzz; 10-29-2014, 11:41 AM.Leave a comment:
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Re: U3011 power fault?
hey i got a new power supply board. but the wiring or all weird up. there is something call the hdcr. is it the same as pwm?
here on the right is the new power supply board. the left one is old.
see it? the nc are swapped. but the pwm went missing and its like replace by hdcr.
same goes for here. on the right side is the new board, left is old.
the left socket had number 8 wire swap.
and the right socket. nothing is swapped but it has extra one wire....Last edited by ktzz; 10-29-2014, 09:40 AM.Leave a comment:
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Re: U3011 power fault?
while waiting for the esr meter to arrive. i went ahead to replace most of the caps, although they look fine no bugle. but it was tilted. so i changed them. and resolder all the joint on the main logic board. and same thing happened. so agent24 was correct. it was not the bga memory problem. neither is the main logic board problem. i cleaned away the flux and stuff too.
i saw the caps on inverter board looks okay too!Leave a comment:
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Re: U3011 power fault?
thanks! im waiting for my esr meter to arrive. btw anyone got any guide to reflow the board?Leave a comment:
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Re: U3011 power fault?
okay. because there someone who happened to be dealing with all this chips. came by my home for a moment. so i can only get him to see this before he went away.
but what u said is quite true too for a bga memory.
can you intro me some esr meters that can test capacitors in-circuit? thanks! i have been looking into it. cant quite find it.Leave a comment:
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Re: U3011 power fault?
sorry for a noob question, in order to check all the capacitor i need to unsolder all the capacitor to check it? is there any way to check them without unsolder them all?
oh the chip i just confirmed it was burnt.
but its bga memory surely it wont cause the problem of randomly power off right?
oh ya when there is no signal from the pc. the power button can remain orange throughout the night.Last edited by ktzz; 10-16-2014, 07:57 AM.Leave a comment:
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Re: U3011 power fault?
Okay! shall have a more precise check later on!
hmmm!!! where can i test this thing???
...
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Re: U3011 power fault?
yeah i still get perfect image. oh okay. hmm i have not personally tested any capacitor yet. i only looked at them. and they seem okay. i think i will get them tested this weekend.Leave a comment:
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Re: U3011 power fault?
okay from what i research even i get the bga memory, i will still need to reprogram it? or i can just buy a new one and just replace it?Leave a comment:
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