Well, diagnostic without BSOD codes!!!
This is how you can get a BSOD!!
1.Did you just install a new program or a piece of hardware, update a driver, install an update, etc.? If so, there's a very good chance that the change you made caused the BSOD.
Undo the change you made and test again for the STOP Error. Depending on what change you made, some solutions might include:
-Advanced Boot Options>Startup using Last Known Good Configuration to undo recent registry and driver changes.
-Use System Restore to undo recent system changes.
-Roll Back device driver to version prior to your driver update.
2.Scan your computer for viruses. Some viruses can cause a Blue Screen of Death, especially ones that infect the master boot record (MBR) or boot sector.
3.Apply all available Windows service packs and other updates. Microsoft regularly releases patches and service packs for their operating systems that may contain fixes for the cause of your BSOD.
4.Return BIOS settings to their default levels. An overclocked or misconfigured BIOS can cause all sorts of random issues, including BSODs.
5.Perform diagnostic tests on all hardware you're able to test.
6.Update your BIOS. In some situations, and outdated BIOS could cause a Blue Screen of Death due to certain incompatibilities.
7.Start your PC with essential hardware only. A useful troubleshooting step in many situations, including BSOD issues, is to start your computer with the minimum hardware necessary to run the operating system. If your computer starts successfully it proves that one of the removed hardware devices was the cause of the STOP message.
Tip: Typically, the only necessary hardware for starting your PC through to the operating system includes the motherboard, CPU, RAM, primary hard drive, keyboard, video card, and monitor.
8.Other causes are faulty RAM and bad capacitors (caps) on the motherboard.
9.Make sure all internal cables, cards, and other components are installed and seated properly. Hardware that's not firmly in place can cause a Blue Screen of Death so try reseating the following and then test for the STOP message again:
-Reseat all internal data and power cables
-Reseat the memory modules