Usual problem so checked power board over and all looked OK fuses diodes etc. Voltage on main caps good at 345v. Standby OK but little else. Checked voltages for turn on with meter connected and signals from main aok. No Vs at all and feed is via X so disconnected lead to Y and switched on - voila 201v sot on. Y sus is E52483 and covered in the gooey gunk from manufacturer. Question 1 can I test sus with buffer removed without damage. 2 any known bad components on this board in your experiences. Thanks in advance.
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Re: LG 42PT250 - TA not turn on
Can anyone assist here? -
Re: LG 42PT250 - TA not turn on
If you did some research youd find the answer out lolPlease Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: LG 42PT250 - TA not turn on
Well given a number of recent posts someone on here needs to search for an article on how to keep your mouth shut if nothing worthwhile to say. I have found the search on this site to return too many non relevant posts but do recall one some time ago that suggested ysus could be damaged if buffer not attached. Also seeking any help re this board from people with far more experience of LG plasma model.Comment
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Re: LG 42PT250 - TA not turn on
Pic attachedAttached FilesComment
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Re: LG 42PT250 - TA not turn on
Have you checked buffer for shorts?I assume no responsibility for any stupid suggestions I might post.Comment
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Re: LG 42PT250 - TA not turn on
Will have to research test method and get back. Did try for VS with buffers removed but no go although protection may then have kicked in.Comment
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Re: LG 42PT250 - TA not turn on
I did do test on buffer by probe on a ysus input connector pin and other pro e run along all the screen output pins - no reaction from mm. Not worked on LG plasma before but have done several Samsung and recall their buffers had test points but nothing marked as such on this buffer. Ysus board in short supply it seems.Comment
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Re: LG 42PT250 - TA not turn on
You could disconnect the Y-sus Bd from the PSU and connect a 230Vac light bulb as a load to the PSU connector supplying the Vs voltage to the Y-sus Bd and apply power the light bulb should glow bright, if the PSU is good. You could measure Va to confirm a working PSU.Comment
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Re: LG 42PT250 - TA not turn on
Andrew F post prompted me to check Va as I didn't do that when it seemed obvious the problem was with Y side board/s. So I disconnect lead X (Z) to Y and test Vs and Va. Surprise now I get nothing with set clicking on off. In frustration I disconnect lead from power board to X and both Vs and Va come up stable at power board connector albeit my meter shows them a few volts over Vs 201 reads 209 and Va 55 reads 58. Back to the drawing board!Comment
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Re: LG 42PT250 - TA not turn on
Hi Maxvalutech
I have same board problem burn some parts and cannot see the number also
I saw your picture att post here may i know the parts number Ey706 and Ey704 please reply thanksComment
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Re: LG 42PT250 - TA not turn on
Please send me the tow transistors number coz my transistors burn and cannot ready the numberAttached FilesComment
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Re: LG 42PT250 - TA not turn on
Luckily still have this and both appear to be....
IRG7IC28U P106D and on bottom line 53 V8
Also note a video is on YouTube about replacing these in another model LGComment
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Hello, i have some issues with my laptop Lenovo Y700-17ISK (motherboard BY511 NM-A541), it started when i turn on the laptop, but the lcd wont turn on, i then connected it via hdmi to tv and screen was ok. So i thought maybe lcd stripe is faulty, i removed the bottom cover, disconnected main battery, reset the cmos by disconnecting battery for 1 min, then slighty move the lcd stripe. Conncted power supply and tuned on my laptop, the lcd turn on, it started to load os, then it turn off, after a second it turn on, then after like 3 seconds turn off again, and so on. Removed power supply, waited... -
To all the members here...
Let me tell you a little bit about what happened to my laptop (MSI GF63 THIN 11UCX model: MS-16R6) that “maybe” you know how to solve this problem.
So before this problem happened, my laptop was running smoothly. When I wanted to restart my laptop, it looked fine at first. But after I waited for this restart process to take a long time, until finally I panicked (because the restart process did not finish plus the laptop screen only showed a black screen), I immediately pressed and held the power button to force the laptop to turn off. But... -
Hello, I have an Acer Aspire 4520 from a couple of decades ago and I want to repair it solely for nostalgia.
It happens that when I turn it on after having been disconnected for a long time, it turns on without problems, it tells me that the BIOS has been reset and that it will load the factory settings, if I tell it to continue, the computer turns on and everything works fine.
The moment I turn it off and want to turn it back on a second time, or restart it and try to start it again, it no longer gives an image, and it no longer responds.
If I remove the... -
Hi everyone,
I am dealing with the problem of turning on and off my Dell e7470 notebook.
The battery charge light is solid white, I press the button, the power indicator and the light on the button are solid for 1-2 seconds and immediately turn off.
The system does not turn on, there is no post.
I removed the RAMs and changed them, changed the battery, RTC battery, AC adapter, removed them and waited, tried again, it does not turn on.
The problem continues in the same way.
I tried to turn on the Fn key, nothing came to the screen.... -
i got this laptop with no power issue....i flashed the bios and laptop can turn on and use normally....but when i shut it down and rest for few minute (2-3 minutes), it wont turn on....i have to flash bios again...any idea what is the problem?...when i shutdown and suddenly press power button to turn on, it will turn on normally....problem happen when i rest the laptop 2-3 minutes after shutdown, it will not turn on....i need to flash bios again
board number VIUX1 NM-A091 REV:1.0...
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