Automatic shutdown when i switch on my computer,it automatically shutdown in 2 seconds

I'm not sure on a 1993, but on the generation 2 Dakotas (1997-2004) the automatic shutdown relay will be deactivated (turning off power to coil and injectors) if the PCM does not receive a signal from the crankshaft position sensor.

your heatsink on cpu is not right and video card not right

Please check your cpu fan properly connected and working or SMPS fan.

Firstly checking processor fan dust and heat compound is dust, then paste new compound

Check the CPU Fan and make certain it is functional. Some computers do an auto-shutdown when the CPU reaches a certain heat ratio upon starting. Make sure the power conncetion is on firmly.

Click the following picture to enlarge:


CPU Overheated
If the system shutdown automatically after power on system for seconds, that means the CPU protection function has been activated. When the CPU is over heated, the motherboard will shutdown automatically to avoid a damage of the CPU, and the system may not power on again.

In this case, please double check:
1. The CPU cooler surface is placed evenly with the CPU surface.
2. CPU fan is rotated normally.
3. CPU fan speed is fulfilling with the CPU speed.

After confirmed, please follow steps below to relief the CPU protection function.
1. Remove the power cord from power supply for seconds.
2. Wait for seconds.
3. Plug in the power cord and boot up the system.

Or you can:
1. Clear the CMOS data.
2. Wait for seconds.
3. Power on the system again.

If after clearing the CMOS you still have no display, you may have damaged your motherboard, CPU, or RAM. If you need further assistance with this Motherboard, let me know.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

had you found a solution ? i'm front the same problem :(

Hi,

This behavior may occur if Windows stops responding during a typical operation or during the shutdown process. By default, the computer is configured to automatically restart when Windows stops responding. To view this setting, follow these steps:

1. Click the Start button, right-click My Computer, click Properties, click the Advanced tab, and then click Settings under Startup and Recovery.
2. Under System Failure, view the Automatically restart check box. If the Automatically restart check box is selected, Windows automatically restarts if the computer stops unexpectedly.

I can give you anotther solution too

Thanks
Xeeshan

If your computer constantly restarts while you are using it, or if you are trying to shut down the computer after it has stopped unexpectedly, click to clear the Automatically restart check box. If you clear this check box, you receive an error message when the computer stops responding. This error message may describe the cause of the problem. You can also review the system log in Event Viewer to view the critical stop error that occurs when the computer restarts.

1. Click the Start button, right-click My Computer, click Properties, click the Advanced tab, and then click Settings under Startup and Recovery.
2. Under System Failure, view the Automatically restart check box. If the Automatically restart check box is selected, Windows automatically restarts if the computer stops unexpectedly.

Thanks & Regards
Nandu :)

have you tried reinstall OS ?