No Power

Symptoms

The computer does not turn on when the power button is pressed.
The computer does not turn on when the power adapter is connected.
No image appears on the built-in display.
There are no signs of life

Quick Checks

Important: Before performing any troubleshooting that requires disassembling the computer, ensure that you have disconnected the battery.

Disconnect all peripherals.
Determine whether the computer has power by confirming that any of the following function correctly:

Fan spins (some models only).
Power connection feedback occurs.
A connected external display functions.
Lights on the top case or keyboard light up

Verify that the user’s power adapter and charging cable are the correct models for the user’s computer.
Check for damage or debris in the charging connectors on the user’s computer, power adapter, AC wall adapter, and charging cable.
Connect the power adapter to each USB-C connector and DC Jack on the computer and retest each time to isolate a possible faulty USB-C port on the user’s computer.
Connect the user’s computer to a known-good compatible power adapter with a known-good charging cable and charge the computer for up to 10 minutes to verify that the computer’s battery can charge.

Laptop Troubleshooting

1. Plug the computer in to a known good power cable & outlet Connect the user’s computer to the user’s power adapter and charging cable that is connected to a known-good electrical outlet. First check for an image on the built-in display. Are there any signs of life?	Yes - The issue can not be recreated Run diagnostics then the device is good to go
	No - Go to step 2
2. Attempt booting while connected to an external display Is an image clearly visible on the external display?	Yes - Go to the article Will Not Display and follow the steps there
	No - Go to step 3
3. Remove the bottom case and disconnect the internal battery Unplug the device from power before unplugging the battery Plug the device back in with the known good power cable & outlet Attempt normal start up Does the device power on with the battery unplugged?	Yes - Replace the Battery
	No - Go to step 4
4. Disconnect the internal hard drive Attempt normal start up (If the device does not have a detachable hard drive, answer No to this question) Does the device power on with the internal hard drive disconnected?	Yes - Replace the failed Hard drive
	No - Go to step 5
5. Replace the RAM with known good shop RAM (If the device does not have detachable RAM, answer No to this question) Attempt normal start up Does the device power on with known good RAM?	Yes - Replace the RAM
	No - Go to step 6
6. Attempt normal start up with the power on pads Disconnect any middle-man boards (If there are no power on pads, answer No to this question) Does the device power on with the power on pads?	Yes - Replace the Power button or Top Case
	No - Go to step 7
7. Does the device have a dedicated DC Jack?	Yes - Go to step 8
	No - Go to step 9
8. Use the multimeter to test that current is getting to the logic board through the DC Jack. Does the multimeter show the correct voltage getting to the board?	Yes - Go to step 9
	No - Replace the DC Jack
9. Is the CPU soldered onto the motherboard?	Yes - Replace the Motherboard
	No - Go to step 10
10. Do you have a known good test CPU on hand?	Yes - Go to step 11
	No - Replace the Motherboard
11. Install the known good CPU into the computer. Attempt normal start up Does the device power on with the known good CPU?	Yes - Replace the CPU on the customers device
	No - Replace the Motherboard