Hi RKG1976,
2000-0142 error indicates hard drive failure on the computer.
We need to replace the hard drive. Try backing up data from the hard drive.
I have provided a link below for drive savers data backup:
Click on the above link and select the options accordingly. They would help you in backing up data.
You can also contact any local technician to back up data.
You may contact our Dell expired warranty services to purchase/replace the Hard drive.
Dell Expired warranty services (US): http://dell.to/1bMx5me
For the LCD lines, you may run LCD BIST.
Awaiting your response!