EPSON WF-C5790/WF-C5790a/WF-C5710/ET-8700/WF-C5210/WF-C5290/WF-C5290a Revision A
Troubleshooting Troubleshooting procedure 161
Confidential
THE PRODUCT CANNOT BE POWERED ON
Symptom
The power does not turn on even if the Power button is pressed.
Cause
Panel Assy failure
Relay Cable (Panel to Main) connection failure, disconnection
Power Supply Assy failure
Main Board failure
Troubleshooting
Step Check and measure Yes No
1
Check the Relay Cable (Panel to Main)
Check the Relay Cable (Panel to Main) according to the procedure below.
Check if the Relay Cable (Panel to Main) is connected correctly.
Check if the Relay Cable (Panel to Main) is damaged.
Make sure there is no problem in the connection or state of the Relay Cable (Panel to
Main).
Go to step 2
When the cable is not connected correctly
Reconnect the Relay Cable (Panel to Main) correctly.
When the cable is damaged
Replace the Relay Cable (Panel to Main).
If the symptom continues to occur, go to step 2.
2
Check with a normal panel unit.
Check by replacing the panel unit with a normal unit (with which normal operation can
be confirmed).
Has the phenomenon been improved upon?
Replace the Panel
Assy. (p. 368)
Go to step 3
3
Check with a normal Power Supply Board.
Check by replacing the Power Supply Board with a normal board (with which normal
operation can be confirmed).
Has the phenomenon been improved upon?
Replace the Power
Supply Assy. (p. 345)
Replace the Main Board Assy. (p. 328)