I have a samsung lcd ln40a330. When I try turning it on it does nothing. Is there a fuse to it.

Check the flix connction of your LCD,clean it and insert it back the flix of you LCD and turn on your phone.....
if nothing happen try to replace a new LCD of your phone

Check the breaker

I have an ln40b630n1fxa and my fuses keep going out as well i took it all apart and seen nothing blown. What would be my next step

When you change the caps check the polarity.Check the diodes,
and the regulators, Resistors,Fuses looks like a transitors
two legs no 3 legs like the transistors get a voltmeter and read the voltage if are there, check the screen voltage.

Look inside first for bad DC filter caps in the power supply.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed SAMSUNG monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net
Capacitors kit: http://lcdalternatives.auctivacommerce.com/ he can make you a set of caps for you.

How to fix it.....
It totally worked for me....
http://www.youtube.com/watch?v=Mm51C_RDIZE

hello have you check the fuse inside the tv glass type it will be in the power supply


regards
shaun

A couple ideas for you and maybe a solution let see!

The power button blinks because the inverter on the TV has given out the inverter is for the back light on your lcd display now the repair is not what I call a simple one if this is under warranty I suggest you bring it in and seek out that warranty otherwide www.partstore.com will help for the part you might need a service manual so you can learn how to put the part in if you not intrested in doing the repair yourself plan on digging into the wallet a little deeper for the labor on this.

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Check the fuse on the power board also check and replace any swollen capacitors on the power board. If still no power then replace the power board.