The part number can be found in the serial number on the white barcode label on the ship.
A simple method to check the power board:
Disconnect the cable connection between the power board and the motherboard. Then power on and observe the backlight. If the backlight lights up, then your power board is ready. If not, you either have a power board or a backlight issue.

 Tip to fix your TV:
power cycling, backlight turning on and off, lines on the screen or no picture on this model is because of bad screen, replacing power board does not solve these issues, It is not in our policy to do a full refund on items returned in opened, used, or damaged condition in that case Fees may apply to our boards in case of return. we will send you a board in 100% working condition. feel free to get back to us with any question about your repair. 
you can respond before we ship the item if you need to cancel your purchase because after we ship it out we cannot cancel the transaction.
Known Models

Brand	Models	Versions
FOR SAMSUNG	HG75AJ690UJXXZ
	HG75AJ690UKXXD
	HG75AJ690UKXXM
	HG75AJ690UKXXT
	HG75AJ690UKXXV
	HG75AJ690UKXXY
	HG75AJ690UKXZN
	HG75EJ690UAREN
	HG75EJ690UBXCI
	HG75EJ690UBXEN
	HG75EJ690UBXXU
	HG75NJ690UFXZA
	UA75NU7100GXXP
	UA75NU7100JXXZ
	UA75NU7100JXZK
	UA75NU7100KBXA
	UA75NU7100KPXD
	UA75NU7100KXGH
	UA75NU7100KXHF
	UA75NU7100KXKE
	UA75NU7100KXLY
	UA75NU7100KXMR
	UA75NU7100KXWT
	UA75NU7100KXXA
	UA75NU7100KXXL
	UA75NU7100KXXM
	UA75NU7100KXXS
	UA75NU7100KXXT
	UA75NU7100KXXV
	UA75NU7100KXZN
	UA75NU7100RXTW
	UA75NU7100RXUM
	UA75NU7100SXEG
	UA75NU7100SXMV
	UA75NU7100SXNZ
	UA75NU7100WXXY
	UA75NU7100WXZW
	UE75NU7100KXXU
	UE75NU7100UXCE
	UE75NU7100UXMI
	UE75NU7100UXRU
	UE75NU7100UXTK
	UE75NU7100UXUA
	UE75NU7100WXXN
	UE75NU7102KXXH
	UE75NU7105KXXC
	UE75NU7170SXXN
	UE75NU7170UXZG
	UE75NU7170UXZT
	UE75NU7172UXXH
	UE75NU7175UXXC
	UE75NU7179UXZG
	UN75NU6900FXZA	BA02,ZA01
	UN75NU6900FXZC	BA02,ZA01
	UN75NU6950FXZA	BA02,ZA01
	UN75NU7090FXZX
	UN75NU7090GXPE
	UN75NU7090PXPA
	UN75NU7100FXZA	FA02
	UN75NU7100FXZC
	UN75NU7100FXZX
	UN75NU7100GXPE
	UN75NU7100GXPR
	UN75NU7100GXUG
UN75NU7100GXZD
UN75NU7100GXZS
UN75NU7100KXZL
UN75NU7100PXPA
UN75NU710DEXZA
UN75NU710DFXZA	FA02
UN75NU7200FXZA	BA03

Buyers must read!!!
Please note that:*
We have a lot of goods on sale, and some of them have not been put on the shelves yet. If you don't find the goods you need, please don't worry. You can contact our customer service and provide photos of your products. We will arrange the search for you after we see the message The TV model we uploaded is only convenient for buyers to search, not to specify the TV model. Because of the country and region, some functions may not be available. You can contact customer service for details before purchasing. (Frequency, antenna and network signals may not be available) Some functions may not be available due to country and region reasons. Please consult customer service for details
1: Please read the title carefully before purchasing. Please confirm the board machine model and machine model. If you are not sure, the right to buy the product does not match the work, which is the responsibility of the buyer. We are not responsible. We can accept the return, but we do not bear the transportation fee.
2. These products are in use and the circuit board components are not damaged. We will test them before delivery,
3. All products are tested before shipment. If the product breaks down during transportation, please inform us immediately after receiving it.
4: Don't be controversial because the product is too old. We have a detailed description. If you can't accept it, please don't place an order to avoid unnecessary disputes. Thank you.
5: Some products are new and original. If there is a new inventory, we will send out all new products. If the new inventory is sold out, we will send out the old products, but all products have been strictly tested before sending out, so don't worry! I hope you understand!
6: All products have a three-month warranty. If you have any quality problems, you can contact us.