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Samsung Ln46b750u1fxza - Blinks but won't turn on    
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Grammie7



Joined: 04 Oct 2015
Posts: 4
Location: Tx

PostPosted: Sun Oct 04, 2015 2:49 pm    Post subject: Samsung Ln46b750u1fxza - Blinks but won't turn on Reply with quote

My Samsung Ln46b750u1fxza

Blinks but won't turn on any longer. It started one morning not turning on by the remote, so I pushed the power button and it turned on. All was normal picture and sound. Then I turned it off with the remote.
Then the next day, I had to hold the power button down for around 30 seconds before it would come on. All was normal picture and sound. Turned off with remote.
Now, when you try to start it, the power light just blinks and won't start up.

I have been reading on this blog it could be a power supply board.

The TV has the best picture and sound, and we have had no problems until now. It was purchased late 2009.

Please help with information on this problem.


Last edited by Grammie7 on Sun Oct 04, 2015 5:17 pm; edited 1 time in total
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JTS1957



Joined: 21 Jan 2009
Posts: 2237
Location: Far, Far Away

PostPosted: Sun Oct 04, 2015 3:32 pm    Post subject: Reply with quote

Grammie7 wrote:
I have been reading on this blog

Search=Ln46b750 - No topics or posts met your search criteria, unless you consider you read it in your own thread - Search=Ln46b750u1fxza?

https://trustiko.com/difference-between-blogs-and-discussion-forums/
Grammie7



Joined: 04 Oct 2015
Posts: 4
Location: Tx

PostPosted: Sun Oct 04, 2015 5:14 pm    Post subject: Reply with quote

I did enter on this forum: Samsung Ln46b750u1fxza but nothing came up directly but to similar models, with similar problem.
JTS1957



Joined: 21 Jan 2009
Posts: 2237
Location: Far, Far Away

PostPosted: Sun Oct 04, 2015 6:14 pm    Post subject: Reply with quote

I'd suggest a good visual exam as the first step, looking for loose connectors, puffed caps, burnt/discolored areas/parts.
Board part numbers and connector pin identity markings can assist remote troubleshooting.

Unplug the Main board to power supply/Inverter board 30-pin cable and see if lamps come on and stay on.
Grammie7



Joined: 04 Oct 2015
Posts: 4
Location: Tx

PostPosted: Tue Oct 06, 2015 12:42 pm    Post subject: I found 2 blown capacitors after opening. Reply with quote

My capacitors are 1200uf 10v 105 degrees. Trying to locate these has been hard. I only need 2 of them. The 2 1200uf 25v 105 degrees. Are not blown.
Found a sale on eBay only. eBay sailer not very sure on quality. Just not sure what to do.
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JTS1957



Joined: 21 Jan 2009
Posts: 2237
Location: Far, Far Away

PostPosted: Tue Oct 06, 2015 12:54 pm    Post subject: Reply with quote

1200ufd - 10 volt - In Stock are the only parameters I put in so includes SM & radial.

http://www.digikey.com/product-search/en?pv13=77&pv63=19&FV=fff40002%2Cfff80009&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25
Grammie7



Joined: 04 Oct 2015
Posts: 4
Location: Tx

PostPosted: Tue Oct 06, 2015 1:16 pm    Post subject: Thank you for the info Reply with quote

That helps me greatly.
JTS1957



Joined: 21 Jan 2009
Posts: 2237
Location: Far, Far Away

PostPosted: Tue Oct 06, 2015 2:14 pm    Post subject: Reply with quote

OR ...

1200ufd - 10 volt - In Stock are the only parameters I put in so includes SM & radial.

http://www.mouser.com/Passive-Components/Capacitors/Aluminum-Electrolytic-Capacitors/_/N-75hqtZscv7?P=1z0wrirZ1z0x6esZ1yx4aw4
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