How to chek serial no of 42" lg 5300 tv - Televison & Video

Consider this:
http://www.coppelltvrepair.com/p/716/lg-42pg20-ua-power-supply-board-repair-service

Hi
As far as I know the serialnumber and themodelnumber are on a label on the back cover of the TV.
Take look
Kolbrun

User manual: http://www.retrevo.com/support/LG-42LG30-TVs-manual/id/15220dj498/t/2/

http://www.fixya.com/support/r4873371-fixing_out_range_format_not_supported

See page 38~40 for what the TV can do when it is used for PC display.
From user manual:

37/42/47/52LG50, 32/37/42/47/52LG60,

32/42/47/52LG70, 42/47LGX, 47LG90,

50/60PG60, 50/60PG70: To get the the best

picture quality, adjust the PC graphics card to
1920x1080.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

You can get it at LG web site:
http://www.lg.com/uk/tv-audio-video/televisions/LG-led-tv-42LE5300.jsp

Do you have an HD ready cable/satellite box? It sounds like your tv is displaying your games in a resolution lower than what it can handle.

You cannot reverse it. Some other manufactures if this happened, you could reinstall old firmware, but not on LG. You must replace your Main PCB

If those are rca jacks on tv being used to go to amp ?
Are you sure they are not input TO tv rather than outputs ?
YOu must use the AV out connectors on TV to go to amp.
25 inces is fine.

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Sound like ur Tuner board have intermitint problems,it work awhile,than the old problems occur again.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.Because this problems come and goes.

The cost of a screen from LG is £430, this is a trade price so you would need to add on extras such as VAT, handling/delivery charges etc, which could take it to near £500. Possibly try looking on e-bay for any cheaper alternatives as this would take the cost close to the price of a new TV.

Correct Serial Would be on the box it came in and should be on you recpeit from Cicuit Cit.. Circuit would be able to get th S/N if it not on the recpit