AUO M270QAN01 - identify diode?

[jjne]

Hi,

I have a small number of monitors based on the above panel and am working through them. I have at least two with a single, burned-out diode. From what I can see it's something like DI428 or DII428 or DH428. Here's a picture of a working one.

Can anyone identify this please? Based on the number 428 it may be a shottky or a Zener according to Google. The device in question is D105.

ETA I can confirm that the number is definitely 428 (I took a video which revealed a better image), the DII appears to be a maker's mark. There's also a code 1G. Looking around the component it looks to perhaps just be the reverse protection for the 12v line in which case I'd have thought that any bog-standard diode should suffice in its place but it leaves me wondering why it would burn out, and more than once as well.

Thanks!

[lotas]

Here you need to look at the bottom line, and this is “IG”, and IG is P4SMAJ13ADF.

[jjne]

Thankyou, that is much appreciated. I think IG was about the only thing I didn't check lol (as 1G is a resistor...).

Will have to transplant from another board temporarily and order some in. Potentially this is good news for this panel if that where the damage has stopped!