7811 won't charge

Just stopped charging today, doesn't show as charging in the tray, green LED on the brick is lit, LED on front of laptop is not on unless you turn the laptop off, then it flashes purple every few seconds, but is not charging.
I read the manual and searched the internet with no luck, can anybody help?

 

Same thing is happening with me right now. My power cord jack was always loose when plugged in at the back but I never paid it any mind. Came home today and it wont charge for anything. Read a couple of forums and some are complaining about the actual socket (which the cable plugs into) being broken or in some cases shifted. Not sure what to do. I bought a targus 180W adapter to see if the adapter is the problem, and I'm waiting for it to arrive to test it.

 

I ordered a new adapter off ebay so I hope it fixes it too, if not apparently a new dc jack can be soldered in, but I don't know if I am up for that, might need to pay somebody.

 

Its either your jack is bad or soldier connections loose and last resort the charging circuit on the board is bad. I have a older laptop this happend to and changing the board is a pain in the , then again you could always buy a external battery charger for around 80 bucks.

 

putting a new dc jack or even just repairing the one on there if it is infact a solder problem is actually fairly easy. i think the most ive ever seen was 5 points max to repair. depending on the size of the solder point you might have to use a slightly higher then average wattage iron (you can increase the effectiveness of your current iron by using a liquid flux) if you do decide to try it out yourself and have no experience in this sort of thing then practice on some broken electronics first (sand a metal spoon if you have nothing to test on)

you can read up on some literature also. soldering is not hard to learn although you wont master it quickly either. if your laptop turns on even though it doesnt charge anymore then lucky for you on the 7805u (possibly all p78 and series designs based on it) the dc jack is on a separate daughter board you could try replacing if you cant fix it.

 

Mine does still turn on, although the battery is close to being out. I talked to a local computer shop that will repair the jack(if it isn't in fact the adapter) for $100 with a 1 day turnaround. I kind of have the itch to try and repair it myself, but I think with something as expensive as my laptop I will let someone more experienced do it. Thanks for the info though.

 

Well I got the new power adapter and it fixed the problem thank goodness! Not bad for $17 shipped instead of a $100 re-soldering job.

 

good to hear but i am astonished that they would charge $100 to put a dc jack on. that price is absurd and robbery. not counting the time it takes to take the laptop apart it would probably only take 5 mins tops but since the jack is on a totally separate board i could do it in less then a min after i got everything i was gonna use together. reminds me of geek squad pricing there. sometimes i wonder if i should just open a shop of my own.