For the past week my M3800 has not been powering-up consistently. I noticed that the USB port that the Logitec mouse transmitter was plugged into was dead and the touch screen was not working. The power-on button would light and the back-lit keyboard would light but the screen remained black. I Googled this problem and found a disturbing number of users had similar issues. I spent an hour and 20 minutes on the phone to Dell Tech Support and the conclusion was that a replacement motherboard was the only solution. The quote from DELL CBS Team was $2,906.20 to replace the motherboard which had a 90 day warranty. Are they kidding...
There were many posts on the DELL forums where users had had their motherboads replaced 2 or 3 times which would suggest that the replacement motherboards were also faulty. As the machine is out of warranty I can't risk spending almost $3,000 on a replacement motherboard and have the same problem a few months later after the warranty has expired.
THIS IS NOT GOOD ENOUGH DELL!!