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https://www.youtube.com/watch?v=tS4sIpdajVw
Aug 23, 2013 - Uploaded by ShopJimmy.com
Repair review of common LCD TV Problems and Repair Solutions ... input the tv is set to it begins making a high pitched whiningsound. .... I have a LG 47LN5750 that powers on, flashes a good picture for about 1/2 second, then goes dark. ... hi my samsung tvis not turning on is black. and I just replace the ...
LG 50PK540 plasma TV Repair power supply EAY60968801 Part 1-2 ... Sanyo DP42849 with high pitched squeal after replacing power supply. ... In my second daily fix video, I solve a mystery that was making me having to turn off my speakers before I went to be ... The flash is accompanied by an high pitched sound.
If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts. LED blinking error codes to many popular brand TVs are given.
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electro-medical.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.
Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts...
http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size
Hi,
If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
https://www.youtube.com/watch?v=TR2iWN6b-LY
https://www.youtube.com/watch?v=TR2iWN6b-LYLCD TV Repair No Power Power Supply Common Symptoms Solutions How to...
CAPACITOR:
A capacitor is a device that stores an electrical charge or energy on its plates. These plates are placed very close together with an insulator in between to prevent the plates from touching each other, and a type of dielectric. A capacitor can carry a voltage equal to the battery or input voltage. Usually a capacitor has more than two plates depending on the capacitance or dielectric type.Once charged the discharge rate can be influenced by another source. This action can create oscillation, or be used for electronic timing. The rate in witch the capacitor charges and discharges can be used to create a filter, or limit unwanted noise. There is lots more we can do with capacitors too.
HOW TO TEST THE CAPACITOR:
There are various methods for testing the capacitors. To short list, I would prefer to use one of the following two methods:
By ESR meter or by multimeter. Assuming that you would not be having the ESR tester just try to test it with the analog or digital meter just to get and idea whether it is defective or not. To test the capacitor do the following:
- Power OFF the device, disconnect it from the mains and wait for 15 minutes.
- Open or desolder one of the legs of the suspected capacitor.
- Take an analog or digital multimeter and set the range on Mag Ohms.
- Touch the probes of multimeter on each side of the capacitor legs and watch the dial (Polarity does not matter in this case).
- The needle of the analog meter or the digits of the digital meter will jump high and then comes back slowly. Reverse the probes and see if this happens again. If this is the case the capacitor is OK.
- If no reading or Zero is found the capacitor is open and is defective. Replace the capacitor.
- If the reading goes high, it is shorted and is defective. Replace the capacitor.
Hope that works. Thank you for visiting Fixya.
it is possible that either the lvds cables connecting the mainboard to the lcd panel are destroyed somehow or either the
Lcd panel itself has the problem could you provide some extra info a photo maybe so i can be more helpfull
hi it sounds like you may have a panel fault, might best to get in contact with the people you purchased it from see if they can help good luck
regards
shaun
