Great to hear that you fixed it, Just i though i should let you know
I gave dell a call today, lol, I first talked to technical to find out how much warranty is left on my panel, It seems i am good till July next year.
Phoning dell was such a pain in the rear end, they transfered me 4 times to a company that provided spare parts for Dell and not sales . After about 45 minutes of phoncall i manage to finally get through to a uk sales adviser.
Ok extending the warranty for a maximum of 5 years is £160(this also includesa the 3 years they give you as standard). The good news is that you can also extend the warranty even if your monitors warranty has finished(well this is what the rep told me) Just thought i should let you know and well worth taking out, even though phone service is terrible, their warranty service is second to none.
Don't tell them you took it apart, lol
good luck