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Re: lg 32LC46 backlight inverter board fault
replacing board ? wheres the fun in that ,
this tv is only worth peanuts due to its age
but i enjoy the challenge of fault finding down to component level .
its the best way to learn
and this tv despite its age ic capable of good clear hd pics
seasons greetings to allComment
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Re: lg 32LC46 backlight inverter board fault
The voltages sent from main board are correct, it is the inverter that is at fault, maybe even a replacement board costing around 7 USD is not worth it on UK? Plus there's shipping.
What about those 0 OHM resistors, are they fine? There should be no voltage drop on any of them, not much else to suggest here.Comment
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Re: lg 32LC46 backlight inverter board fault
finally fixed inverter board fault
47 ohm r76 was o/c causing shading left to right
its across d12Comment
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Re: lg 32LC46 backlight inverter board fault
Well done. Persistance paid off.Willing to help but I'm no expert.Comment
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Greetings everyone,
I have a HANNSG Hi221 monitor that exhibits two seconds to black issues (backlight goes off, display is still on as confirmed by shining a flashlight on it) with some additional oddities...
The monitor failed on me with a standard "2 seconds to black" some time ago prompting me to initially replace most of the electrolytic capacitors (some of them were bulging/leaking).
Things kinda sorta worked for a night, then the problem returned along with some flickering and "buzzing" noises.
Upon closer inspection... -
Hello everyone. 😀
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs... -
I have two of these spotwash machines. They are portable systems that use a 12V power tool battery consisting of three 18650 cells. One of the batteries recently failed. 12V appears at the terminals but there appears to be a fault condition - machine flashes LEDs when you attempt to power up. When you plug in the battery directly (the machine charges through a USB-C port, but there is a second USB-C port on the battery itself for some reason that can also be used for charging), the green LED lights and a dim red LED lights next to it solid. By comparison, a working battery will flash green only....
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Good day all,
I got a 2007 MacBook from a friend. The fan was not working so it was overheating.
Once the fan was swapped, I installed an OS and it worked fine.
The board had quite a few corroded spots so I removed it, touched those spots with a soldering iron, washed the board in PCB cleaning fluid (I've done that many times), rinsed it with distilled water, dried it etc.
Unfortunately it doesn't work anymore. It does turn on, fan spins, power LED turns on. But no picture.
If I see that right, I have missed VCORE on L7100 (page 59).... -
Hello, I came here after finding some similar questions asked on other monitors and hope someone here can help me get an ancient Viewsonic VP230mp (23" 4:3 LCD) back to working condition.
First a little background, I have a background in computer and electrical engineering, and I'm smart enough to know I know nothing about LCD displays and how they work. For this topic I'm as green as they come.
When the display is turned on the viewsonic logo displays in the uppper left for 2 seconds then the screen goes black, the power LED is green (on) and when a computer is connected...
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