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05-11-2022 12:57 PM - edited 05-11-2022 12:58 PM
Have you tried any of the windows display tools such as calibration?
https://classroom.synonym.com/fix-fading-color-computer-screen-20673.html
If the dim area becomes readable when you shine a flashlight the problem might be the backlight failing.
FWIW, a "backlight bleed test" https://www.lightbleedtest.com/#
disassembly / replace screen
https://www.youtube.com/watch?v=wzDUnYzY8BQ
you have either Samsung or LG as shown here
https://partsurfer.hp.com/partsurfer/?searchtext=H1N57AA&searchby=product
I got the above looking this up.
Guessing Samsung: 652255-001
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=hp+652255-001&_sacat=0
if you are in Asia then AliExpress instead of eBay
https://www.aliexpress.com/item/1005003687007869.html
be sure to check reviews of any AliExpress vendor.
and look for good reviews and contact them first
you can usually get a better price by looking up the Samsung or LG part number instead of the HP #
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