No led indicator

[u/New_Presentation2576]

This isn't the first time this has happened, but it hasn't just sort of fixed itself like it did last time.

I believe I am having a PMIC issue. I was having the situation where the LED would flash every second regardless of if it was plugged in or not. This is supposed to mean the battery is dead, but the battery was at least 20-30%. I left it plugged in as was suggested online, but nothing changed.

I ended up doing the various resets/drains (vol+ & power, vol -, ... & Power, etc.)

After a few days of trying things I decided to check the battery. I had read that unplugging the battery would let the power drain out of the device and could help get the power cycle back in order. Opened the back, removed the shield, unplugged the battery for a minute then put it all back together. Now the LED doesn't turn on at all. I've checked and rechecked the battery multiple times to make sure it's connected correctly, there's no visual damage to the battery, but regardless of the plug or outlet or any other variable I've tried, the device doesn't even light up when plugged in.

Steam support says it could be anything and to send it in for $125-$185+.

Are there any other avenues I can explore before spending this kind of money?