Power supply green light but computer won’t turn on? Most of the time it is the cause of low-quality PSU. If your PSU is lower grade, it is better to replace it with a newer one (replace PSU with the same watt that your existing one has i.e. if your PSU is 550W or 750W buy the same watt). Otherwise, follow another way for troubleshooting.
Blinking green light on power supply but no power, why?
There are so many things can occur this problem. Most of the case Power Supply Unit (PSU) is the main cause. Besides, PSU a faulty motherboard or RAM could be cause of this issue.
How to fix Power supply green light but computer won’t turn on
Performing a hard reset can solve the problem. A hard reset releases the power stored in the hardware component which helps to resolve the startup problem.
How to hard reset the computer
- If your computer has power but windows are not open, press and hold the power button until the turn off the computer.
- Remove the power cord from the computer.
- Then, press and hold the power button for 5 seconds. The power light indication will ON for a second then off.
- Connect the power cord again and turn on the computer.
If the guide is not solve power supply green light but computer won’t turn on issue replace the power supply.