Looks like Dell needs to be asked.
If the machine works, why not use it? (you didn't write it was dead.)
I plugged my oldie but goodie Dell Latitude in. I haven't used it in almost a year; don't know if that factors into it.
the indicator light was steady green when I plugged it in, and about an hour later it was flashing amber. Manual says nothing about this.
While I do own a solder iron and would do that on my own gear the problem is that if such gear would cause a fire or worse then it would be my fault and given the litigious climate today I would NEVER do this repair or endorse it.
You are very much on your own here. Use your judgment for this one.