![](/images/new-backgrounds/1330436/330436305x1.webp)
Power LED flashes Red four times, once every second, followed by a two second pause, and the computer beeps four times. (Beeps stop after fifth iteration but LEDs continue flashing.)
Cause | Solution | |
|
|
|
Power failure (power supply is overloaded). | 1. | If equipped with a voltage selector, check that the |
|
| voltage selector, located on the rear of the power supply |
|
| (some models), is set to the appropriate voltage. Proper |
|
| voltage setting depends on your region. |
| 2. | Open the access panel and ensure the power supply |
|
| cable is seated into the connector on the system board. |
| 3. | Check if a device is causing the problem by removing |
|
| ALL attached devices (such as hard drives or optical |
|
| drives and expansion cards). Power on the system. If |
|
| the system enters POST, then power off and replace |
|
| one device at a time and repeat this procedure until |
|
| failure occurs. Replace the device that is causing the |
|
| failure. Continue adding devices one at a time to ensure |
|
| all devices are functioning properly. |
| 4. | Replace the power supply. |
| 5. | Replace the system board. |
|
| |
The incorrect external power supply adapter is being used on | The power supply adapter must be at the correct power | |
the | rating and use the Smart ID technology before the system | |
| will power up. Replace the power supply adapter with the | |
| ||
|
|
|
144 Chapter 8 Troubleshooting Without Diagnostics