How to check voltage on power supply on samsung pn51f4500afxza?

Televisions that are hit during a storm often have one, two or all the boards damaged. The voltage surge can be considerable. The problem is the diagnostics, this explains

https://www.fixya.com/support/r29790007-repairing_own_television

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check the power supply stand by supply to connect a 1 k resistor series through power on pin

A voltage surge has damaged the power supply, the first board in line with the power cord that carried the transient.. Pull out the board and carefully examine all of its components, especially look for burnt or discolored resistors, bad diodes, bulging or leaking capacitors. If you have time and patience check out as many of the components as you can because the damage is on that board.
Worst case scenario is to get a new board. But if you check out ebay under the tv name, often you find sets and good replacement parts. Often the board has a part number on it and you can directly look for a listing for it on that site. Guaranteed to be good and often much less expensive that getting it from authorized supplier.

i need the power supply number. BN44-00?????

Power surges can do major damage to multiple boards, it is possible you have other faulty boards. You will need a multimeter at the very least to be sure.

try the main PCB. This has your CPu on it which controls this circuitry.
Try this web site, but use your COMPLETE model number as various sub models use different parts. https://www.encompassparts.com/model/SMGPN51F4500AFXZA/_/_/Samsung/PN51F4500AFXZA/51-INCH_PLASMA_4500_SERIES_TV_720P
main PCB: BN96-24574A
MAIN PCB BN96-19471A

http://www.samsungparts.com/Products/Parts_and_Accessories/PN51F4500AF/Default.aspx
MAIN PCB: BN94-06195C

hi usually the cause of won't power on problem due to the storm is the current fluctuation which the tendency is power supply failure. now since totally dead set what you need is to open the tv unit then look for the power supply where the power cord is connected. check obvious defective component part like blown fuse and burnt part like resistor and capacitor. just replaced with the same value and ratings to avoid damage from others component.if their is no problem with the power supply the output voltages are good the main board get damaged. good luck thanks for consulting the fixya.

You have a diode arrangement in your power supply that converts the AC power to DC power so that it can be stepped up to operate the high voltage power supply of the set. If those diodes are blown, which happens frequently in a storm, then you have no voltage to your high voltage. You are going to have to check that diode arrangement by making a continuity check both ways on each diode. A diode blocks voltage one way but lets it pass the other way, thus producing a DC voltage.

internal fuse, small 2 amp slow blow, check both, some times white coated inside when blows turns brown in middle, voltage spike problem