chance of repairing this

[AdamB]

Hi all,
I recently obtained a broken miller digital elite welding helmet and are looking into buying a new electronic lense. I was just wondering if it would be possible to repair the broken one. On one of the battery ports (it takes two 2450 batteries) the resistance between the contacts is 9.6 megaohms and on the other one the resistance is 0.44 kiloohms. the issue with the helmet was that the right side did not auto darken. the reason I believe it might be difficult to repair is that the components are mainly microcomputers and micro transistors. this is the component: https://www.ebay.com/p/Miller-Digital-Elite-Auto-darkening-Welding-Lens-256469/1603495817?iid=390581441171

[helius]

Does this device use a flexible printed circuit?

[AdamB]

yes it is surface mount although I think I repaired it so all good

[james_s]

With anything like this, whether or not you can reasonably repair it usually comes down to whether you can get it apart without completely destroying it.

[Doctorandus_P]

USD 245 ?Gosh.

A quick search for "welding helmet LCD: on Ali pops up results starting from around  USD10:
https://www.aliexpress.com/wholesale?SearchText=welding+helmet+lcd

I prefer the LCD's without battery. Less to go wrong, and therefore hopefully more reliable.
It's very annoying when your helmet turns itself off after 15 minutes, and you get to see spots swimming in front of your eyes because your helmet didn't turn on while welding.

These do however often have smaller size of the LCD, but I've never found that a problem, as long as I can see the the area a few cm around the place I'm welding.

But your USD245 version likely has a better build quality and is worthy of a repair.
It is unikely that the uC is broken. It is more likely a broken wire or bad solder joint.
It may also be some dirt (metal dust from grinding etc) has gotten into the electronics, try blowing it with an air compressor.

I'm curious what the circuit of the electronics of such a welding helmet looks like. I would at least expect a conformal coating.
Can you post some pictures?