Can just say hello all great site you have, i have the above tv which is stuck in stand by mode looked on alot of websites and researched this tv first of all i thought it was a power supply board fault but replaced the power board still the same problem is there but the tv boots up when i disconnect the Z sustain board does anyone know or have any idea what the problem may be? i would be grateful for any help i can get as the mrs is gonna kill me if i keep spending money on it lol
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
Obviously there are a fault in the Z-SUS board, since the powersupply operates normally without it. Examine the area around the big heatsink. Under that heatsink there are a so called IPM, a hybrid integrated circuit, a very common failure on both Z-SUS and Y-SUS boards. -
Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
The problem is probably the Z-Sustain board. The standard troubleshooting procedure for a 'won't power up' problem with these sets is to unplug the power cable to the Z sustain and try turning it on. If it doesn't turn on, reconnect the Z-sustain and disconnect the power cable to the Y-Sustain and try again. If it does turn on (of course, there won't be a picture), replace whichever Sustain board caused the problem.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
Thank you very much for you quick reply ive checked the z sustain board appears ok but i have found this on another board are these blown ?Attached FilesComment
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For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
Yep my mistake should read up about itComment
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
Rechecked the z sustain board and found a capacitor that was not working so hopefully when i replace it the tv will work again .Attached FilesComment
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
The MOSFET's/IPM on the Z sustain board are probably shorted. You can check this by putting an ohm meter across the 190V and ground supply at the power connector on the board. If it's low it's shorted.
I'm replacing a Y sustain board on a Samsung for the same reason, shorted MOSFET's on this one; even though the PSU fired up and provided power to the board which in turn opened the fuse on the board. I was going to replace the MOSFET's but I figure that the rest of the board might be suspect too.Soundcraft CPS-450 and CPS-550 (Rebuilds - Completed!)
Samsung PS42V6S - in repair (New Y-SUS Board Completed)
Philips 32PFL7782D/05 - in repair (PSU or Main Board - Selling)
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
yep the IPM are at fault just waying up if worth the cost was first told that it was the power suply board so bought 1 them which is now spare loll and z board gonna cost between 40-100 so may just see if can pick up a tv with cracked screen not put me off trying to fix it thought and will buy another fix up once this one is done .
and thank you all for your great helpComment
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Re: LG MZ-42PZ44 42" Plasma Television (stuck in stadby)
Yea, see the thing is a lot of people think that when a Plasma/LCD dont work it's the PSU when there's plenty to go wrong.
Look at the Z sus board closely for a part number and post it here.
I've got a feeling that a brand ne LG board will be less than a ton.
EDIT:
Your right. This is a brand new one here...Last edited by Remeniz; 02-01-2011, 03:14 PM.Soundcraft CPS-450 and CPS-550 (Rebuilds - Completed!)
Samsung PS42V6S - in repair (New Y-SUS Board Completed)
Philips 32PFL7782D/05 - in repair (PSU or Main Board - Selling)
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hello,
I hope someone on this forum can assist me.
I have a panasonic TH-42PC77U plasma television.
the lower 1/2 of the screen has become flaky....in and out, then finally goes black and you can only see the top portion.
i have performed the reset to default settings quite a few times. Panasonic recommended..did not believe this would help...it didn't.
I have removed the back panel and looked around for something obvious...burn marks in a board, etc....nothing obvious...
I have read some posts that suggest the problem is related to the boards on the left... -
Hey....
Board as written in description was stuck at VGA LED. common Problem wit these type of bords.... tried all the "standard stuff" like resettin... reseatin.... found out the LED Controller MCU1 = IT8295FN-56A geting burning hot under the last PCI Slot.. now i desoldered it cause there were only 18 ohms at the caps arround.... another aorus x470 in working condition with similar part and nearly same layout had arround 280 ohms...
my question is: why doesnt the board start know without this chip.... worked myself through the boardview but i can´t understand... -
Hi all,
I’m trying to recover a Lenovo Yoga Slim 7-14ARE05 with board DA0LS3MBAF0 Rev:F. I’ve run into an unusual issue where USB-C PD is stuck at 4.7–5V and the system won’t boot (keyboard lights flash briefly, then nothing).
🔥 The Problem Started After Suspected ESD/PD Fault
I experienced a power issue or ESD event through a USB-C charger
After that, the NX20P5090 power switch was visibly burned and was replaced
Now the PD controller always negotiates 5V @ 2A, even with known-good chargers
🧠 What I’ve Done So Far
Flashed... -
Hello All,
I have an issue with my Majority PETERHOUSE GRADUATE Internet Radio, it keeps rebooting at the boot logo Welcome screen. I have an another forum active in other website but due to lack of response I am posting the same here. I am positing a link below that has pictures including all the troubleshooting I have tried, appreciate if someone can take a look and give me any suggestions.
https://www.hifivision.com/threads/m...-screen.98243/
Troubleshooting Summary: Majority Internet Radio - Flash Chip... -
Hi All.
I have an 820-02016 board (A2337 M1) that has come in for data recovery. Reported as liquid damage, but no visible evidence of any liquid damage.
Board was initially stuck at 5v, and current only spiking occasionally to around 400mA and cycling.
After initial troubleshooting, found that C7800 (which feeds the power rail PP5V_BSTLQ_VOUT_SPMU) was dead short to ground.
Replaced C7800 and short gone. Board still stuck at 5v. Current draw behaviour changed. It now spikes up for a second to around 100mA to 130mA, then drops down to...
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