![]() |
|
|
Thread Tools | Display Modes |
![]() |
#41 |
New Member
Join Date: Oct 2013
City & State: TX
My Country: US
I'm a: Knowledge Seeker
Posts: 3
|
![]() OMG! Exactly what i was looking for! retiredcaps Thanks a ton for putting together such an informative post. You have no idea how helpful it is for a newbie like me. Thanks again!
|
![]() |
![]() |
![]() |
#42 |
New Member
Join Date: Oct 2013
City & State: atlanta,georgia
My Country: usa
I'm a: Knowledge Seeker
Posts: 3
|
![]() C5706 is short for 2SC5706. Newark electronics doesnt carry these stock but an internet search shows they are similar to 2SC3518. Its always wise to look at the pdf data sheets of each and see if they are similar enough.
|
![]() |
![]() |
![]() |
#43 |
New Member
Join Date: Dec 2013
City & State: Detroit Michigan
My Country: United States
I'm a: Knowledge Seeker
Posts: 2
|
![]() I'm having a similar problem with an Acer x223w where it powers on for a couple seconds and the power light stays on except that I see no display when shining a light on the screen.
Should I still try following these instructions or look elsewhere? |
![]() |
![]() |
![]() |
#44 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,102
|
![]() @feepit, please start a new thread in the monitor forum and put the make and model of the monitor in the name tag, also post good clear pictures of the boards.
__________________
Never stop learning Basic LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 |
![]() |
![]() |
![]() |
#45 |
New Member
Join Date: Jan 2014
City & State: NL
My Country: Canada
I'm a: Knowledge Seeker
Posts: 1
|
![]() Thank you, this thread is amazingly helpful and well written!
|
![]() |
![]() |
![]() |
#46 |
New Member
Join Date: Nov 2010
City & State: Bucharest
My Country: Romania
Line Voltage: 220VAC 50Hz
I'm a: Hobbyist Tech
Posts: 6
|
![]() Thank you! Very useful thread.
|
![]() |
![]() |
![]() |
#47 |
Member
Join Date: Oct 2013
City & State: manila
My Country: Philippines
I'm a: Knowledge Seeker
Posts: 23
|
![]() Bad screen panel can cause 2 seconds to black. This time the behaviour is different. That is why, I am confused at first.
The loop is, 2 seconds to black when pushing the power button, i saw some reddish background and the "no signal" box, the LED will stay on for about 3 seconds then the screen flash again in another 2 seconds to black with the "no signal box" again, this time no reddish background. After that it's all black forever but with the LED still on. The LED in this case is blue and this not change colors. I tried connecting the cable, and yes I can see images coming but only for awhile as this unit is always shutting down.. I'm guessing it's kinda rare issue. I tried searching for solution/s but I can't seem to find one. I replaced the panel with a known good one and it works smoothly. It's a Samsung CX743B. A 17-incher ccfl powered LCD monitor. Just jotting it down for future reference and knowledge sharing purposes. My theory is that there is a shorted component in the screen panel or it is slowly dying and showing signs of deterioration. Good day to all... |
![]() |
![]() |
![]() |
#48 |
New Member
Join Date: Jul 2014
City & State: Hemet, California
My Country: United States
Line Voltage: 125VAC 60Hz
I'm a: Knowledge Seeker
Posts: 13
|
![]() Thank you retiredcaps! You and the other members are very kind to share all of this information.
|
![]() |
![]() |
![]() |
#49 |
Member
Join Date: Sep 2014
City & State: Louisiana
My Country: USA
I'm a: Knowledge Seeker
Posts: 22
|
![]() Very good info here! Thank you to all involved. Im hoping to get my display back up and running but will have to start a thread as it is very unusual, at least to me.
|
![]() |
![]() |
![]() |
#50 |
Member
Join Date: Nov 2013
City & State: jamestown nd
My Country: usa
I'm a: Knowledge Seeker
Posts: 26
|
![]() Hello to you all. I hope that you can guide or direct me here. I have a 40 inch TCL LCD tv and am getting the 2 seconds to black issue. so far I have replaced the inverter board and gotten no change but my specific issue is that when I power it on, vertically I get half the screen to light up on the right and nothing on the left side then goes to standby and audio still works. I am baffled because when I first tested this issue the screen lit up very dim on the left and nothing on the right. after taking the tv apart and removing the original inverter board to look at the lamps, I reassembled the tv and upon initial power on after that it was the same problem but it had moved from the right being black to the left during the 2 seconds to black condition. Please help. Thanks all
|
![]() |
![]() |
![]() |
#51 |
Member
Join Date: Oct 2014
City & State: EDO STATE
My Country: NIGERIA
I'm a: Knowledge Seeker
Posts: 46
|
![]() woww. amazing post.
I'm thrill the way your explanation goes here. l will will keep this in mind. thanks alot retiredcap |
![]() |
![]() |
![]() |
#52 |
Member
Join Date: Mar 2011
Posts: 65
|
![]() Thank you very much retiredcaps sir.
|
![]() |
![]() |
![]() |
#53 | |
New Member
Join Date: Feb 2015
City & State: Vienna
My Country: Austria
I'm a: Knowledge Seeker
Posts: 2
|
![]() Excellent tips, could save a lot of money and time.
Quote:
This test, however, can isolate which, and how many CCFLs have gone bad as with the working lamp plugged in the picture would still be visible (for a short period) but quite dim. However, when the bad lamp is plugged in there would be no picture at all in that 2 (or less) seconds. There's another interesting thing described in this thread, where a digital MM or even a capacitor connected at right place acts as confusing element for feedback protection circuitry and the picture will stay on even with 3 working lamps, hence no black picture symptom. This can sometimes be useful as the repair can be uneconomical. And after all, replacing the lamps is a tricky as one can score a perfect "hat trick" only to completely mess on the 4th attempt (usually on friend's panel ![]() My point is, running LCD with 3 or even 2 lamps can still sometimes be acceptable until all of them die, but this requires finding a way to confuse protection mechanism by attaching something that the feedback sees as a good lamp. Question is: what is the best and safest way to do it? BTW: the "remains" of the monitor can then be used to build pretty good standalone CCFL tester. ![]() Cheers. |
|
![]() |
![]() |
![]() |
#54 |
Member
Join Date: Mar 2012
City & State: Bucharest
My Country: Romania
I'm a: Knowledge Seeker
Posts: 25
|
![]() Thank you for this amazing tutorial!
In my case (RPC LCD - junk with PSU Mirage PI-170DTLA) it was one CCFL lamp; I tested with one took from a Samsung LCD and voila, evrika... no more 2 seconds to black!!! Of course I changed all caps and IC202 and IC203. So, check the CCFL lamps! It's complicated to disassembly. |
![]() |
![]() |
![]() |
#55 |
New Member
Join Date: Apr 2015
City & State: Rakovník
My Country: Česká republika
Line Voltage: 230VAC 50Hz
I'm a: Knowledge Seeker
Posts: 11
|
![]() <--- delete me --->
(moved to new thread) Last edited by guirnab; 04-14-2015 at 10:32 AM.. Reason: wrong thread |
![]() |
![]() |
![]() |
#56 |
Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,102
|
![]() You should create a new thread for the question you have regarding to the monitor repair, this thread is for the guide on how to.
|
![]() |
![]() |
![]() |
#57 |
New Member
Join Date: Feb 2014
City & State: tusc. al
My Country: usa
I'm a: Knowledge Seeker
Posts: 4
|
![]() Thank you helped alot im still learning helped me tremendously
|
![]() |
![]() |
![]() |
#58 |
Member
Join Date: Apr 2016
City & State: Chisinau
My Country: Moldova
I'm a: Knowledge Seeker
Posts: 37
|
![]() Quick question.
I have the 11P06 MOSFET (i hope it's a mosfet) and when connecting the red to the Drain and black to the Source I get 511 (diode mode) and a guy on Youtube says there shouldn't be. Is it faulty? |
![]() |
![]() |
![]() |
#59 |
New Member
Join Date: Jun 2016
City & State: CA
My Country: USA
I'm a: Knowledge Seeker
Posts: 1
|
![]() thanks a lot for the guide!
|
![]() |
![]() |
![]() |
#60 |
New Member
Join Date: May 2016
City & State: quebec
My Country: canada
I'm a: Knowledge Seeker
Posts: 3
|
![]() Hello, i have an asus vh242h that does a ''2 seconds to black'' I have completely dissassemble the monitor. from what i can see, when i turn the monitor on, the both lamps don't turn completely on. they kinda turn on like a loading screen. (they both go at the same pace.) and before they hit the end, the monitor turns off. I have a feeling its the power board. because of the symptoms its giving me. but i am definitely not an electrician. and i was wondering if someone with more tech savy then i do can confirm my theory.
|
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | |
|
|