Philips 65PUS7805/12 backlight problem

Hiya all,

Just received a broken Philips 65” 7805/12 for free. Ambilight and sound works. When shining a light at the tv I can see the text telling me to plug something into the hdmi port.

So I’m willing to give this a try. But I’m wondering if I have to strip down the whole TV to get the model number for the backlight strips or if it’s possible to know any other way?

Also is there something else I could check to rule out the backlight array? Every search online says it’s the issue but might just ask anyway.