Samsung le4m87bd av board

[adamp91gvm]

Hi all i have this samsung the original av board will click over and over untill heat is applied to the board then works fine. So i bought another board exactly the same as shown in pics but... this board gives a negative image the boards look identical if i plug the old board in heat it up the tv comes on fine anyone any ideas

[dick_barton]

Re: Samsung le4m87bd av board

Can you narrow down the location at which point being heated brings up your picture. If you can then you can probably repair the main board.
I see the name Bordeaux Plus BN41-???????? number on one of the boards. Does this number match both boards

[cheeky2]

Re: Samsung le4m87bd av board

Go into the service menu and change the settings for the screen manufacture! I recently changed my board and had to change screen manufacture.
The changes will take place once turned to standby. Take a picture of the original settings before making any changes on your new board.
service menu entered from on standby pressing the following keys
'info' 'menu' 'mute' followed by power button on remote control.

Good Luck

[budm]

Re: Samsung le4m87bd av board

More likely bad caps on the old board.
Is your LCD panel made BY AUOPTO?
The board on the left has BN94-01490E on the barcode sticker, the one on the right I cannot read the number.
Post 3 suggestion may also solve the problem due to the LCD panel does not match your new board.

[finntricky]

Re: Samsung le4m87bd av board

under the big shield on the main board there is 2 x 1000uf - 10v SM caps, if warming the shield turns the tv on, then this is your problem, just replace the 2 caps, i have done loads with this problem.

[tom66]

Re: Samsung le4m87bd av board

If all these suggestions don't work it may also be worth swapping the EEPROMs over between boards.

[adamp91gvm]

Re: Samsung le4m87bd av board

Cheeky2 the menu buttons worked a treat i was very suppised on all the different screen types on there but tv works amazing now thank you again all