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Old 11-08-2019, 09:01 AM   #6
New Member
Join Date: Oct 2019
City & State: Brighton, Michigan
My Country: USA
Line Voltage: 110VAC
I'm a: Hobbyist Tech
Posts: 8
Default Re: Samsung LN40B540P8F LCD Backlight Problems

I pulled the transformer that had a reading of 950 ohms on one of the secondary coils and ordered a new one.

Before installing the new one I checked the resistance on the primary and it was 10.6 ohms. The secondary coils were at about 850 ohms.

My understanding is that the primary should be around 13 ohms and the secondaries at 1.1K ohms.

Do you suppose that I received a defective unit?

Should I ask for another one to be sent?

This is the one that I purchased from ShopJimmy via eBay:

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