small help for my motherboard note 20 samsung

Hi @madisonjfry

I don't think that there is a separate backlight IC as such.

According to the specifications the phone has an amoled display.

Amoled displays are different to LCD displays in that the individual pixels produce their own light so separate backlighting is not necessary. The pixels are either turned on or off.

Here's a link that describes it better than I can, that may help

Hi @madisonjfry ,

Perhaps check if the display cable is securely connected first.

Here's the no display troubleshooting flowchart from the service manual that may help to know whether it's a display problem or a systemboard problem.

Unfortunately the manual is not quite complete as it doesn't show the location of all the components mentioned as test points. -

I only found one i.e. U10001. Here's an image of the board that it's on to show its exact location on that board.

(click on images)

Hi @madisonjfry

Here are the Samsung part numbers for the complete display modules for the model. It seems that there is more than one part number for the same part as searching for any of the part numbers for a variant gives the same result. Search online using the part number only to find suppliers that suit you best

Samsung Galaxy Note 20 Ultra (SM-N985F SM-N986F)

Display unit complete mystic white GH82-23622C GH82-23597C GH82-23621C GH82-23511C GH82-23599C GH82-23596C

Samsung Galaxy Note 20 Ultra (SM-N985F SM-N986F)

Display unit complete mystic black GH82-23622A GH82-23597A GH82-23621A GH82-23511A GH82-23599A GH82-23596A

Samsung Galaxy Note 20 Ultra (SM-N985F SM-N986F)

Display unit complete mystic bronze GH82-23622D GH82-23597D GH82-23621D GH82-23511D GH82-23599D GH82-23596D