Lg 50pk590

[Hamie]

Re: Lg 50pk590

I bought a replacement part IC301. It was the only part in the repair kits i hadn't tested as i was unsure how.

No that's on the power supply.

I need to stress you have do not have a problem with your power supply.
That kit is for for "the tv clicks on then goes back to standby'

You have a constant vs and constant va, and permanent panel glow.
The power supply and ysus are performing as expected.

You have either a faulty control board or a faulty mainboard.

I'm fairly confident if you replace the mainboard your tv will work again.

[diif]

Re: Lg 50pk590

Ah, i understand now Hamie, thanks, i shall look to source a new mainboard.

[Hamie]

Re: Lg 50pk590

If you can't find one for the 50pk590.
The 50pk350 might share the same boards.

[diif]

Re: Lg 50pk590

Can you shed any light on the LED flashing differently on the control board ?
Should i put the other IC back ?

[tom66]

Re: Lg 50pk590

I believe it's a temperature indication - I'm not certain it's a fault code. I remember reading somewhere in an LG manual.

[diif]

Re: Lg 50pk590

Thanks guys, when looking for a replacement is it the EAX61141604 number i use ?

[tom66]

Re: Lg 50pk590

EAX = Assembly number, whole board w/ exact parts
EBR = Board number, blank PCB with possibly many options

Use EAX over EBR

[diif]

Re: Lg 50pk590

Thanks Tom, seems they are quite scarce.

[Hamie]

Re: Lg 50pk590

Just thought I'd update this, I recently repaired a 50PK350. Whilst repairing it I noticed that someone was selling a 50PK590 with a faulty panel, I bought it to see if you can easily upgrade and downgrade this TV with the mainboard swapped.

You can, and the back cover of the 50pk590 also fits perfectly on the pk350 front.

if you don't have a broken screen you would have to make some modifications to the back cover if you are forced to 'downgrade' to the 350.

Just though I'd post this incase anyone struggles to get a mainboard for the 590 and just wants a working TV, As the 350 mainboard are more common.

Or if you have a 350 and want to upgrade it so that it has 4 HDMI and 2 USB along with HD freeview and internet access. Keep you eyes peeled for a faulty/broken 590.

[sordids999]

Re: Lg 50pk590

hello

im struggling with a different fault sound but no picture
VS 202 volts VA 59 volts also Zbias is good
but -vy = -18 volts vsc = 19 volts on the Ysus

what i have done so far
1.Removed buffers voltages still the same
2.Removed Zsus from power supply still no change
3.Checked the three 10 ohm resistors on power supply all readings good
4. Tried jumping control board with main board disconnected but nothing

any ideas

[Hamie]

Re: Lg 50pk590

You have a faulty y-sus.

Usually checking the heatsinks for shorts would be a good place to start.
But considering that you can buy a replacement y-sus for £14 on eBay it's probably easier quicker and even possibly cheaper just to change out the board.

[sordids999]

Re: Lg 50pk590

Thanks hamie ill update soon how i get on

[sordids999]

Re: Lg 50pk590

Ysus replaced all working again

[newtonuk]

Re: Lg 50pk590

Hi, sorry to resurrect an old thread, but my 50PK590 just started doing this. The set turns on, the screen glows, but it won't show any picture including menus etc.

I'm not very electrical, but would appreciate your help. I've also found this service on eBay which seems promising...

http://www.ebay.co.uk/itm/Repair-Ser...8AAOSw~y9ZHJch