Monitor causes computer to shutdown

I have my Dell Inspiron 530s connected to a Samsung HD TV monitor for use as a media center. When I power off my monitor, it causes the computer to shutdown/crash. When I turn the monitor back on, the computer restarts itself, occasionally going to a black screen giving startup options. The video card is a GeForce 9400 and has the latest driver from nvidia. The monitor is connected via a HDMI/DVI cable. After a few days of looking for a solution, I have no idea what might be causing this.

Here is what Windows said after restarting this last time:

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7100.2.0.0.256.1
Locale ID: 1033

Additional information about the problem:
BCCode: 1000007e
BCP1: C0000005
BCP2: 86AD510D
BCP3: 8B63CB7C
BCP4: 8B63C760
OS Version: 6_1_7100
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\062309-22776-01.dmp
C:\Users\Jeff\AppData\Local\Temp\WER-37003-0.sysdata.xml