Epson ELPDC21 Not turning on, led blinking

Epson ELPDC21 Not turning on, led blinking
Device	Epson ELPDC21
Affects part(s)	Connectors
Needs equipment	Screwdrivers
Difficulty	◉◉◌◌ Medium
Type	Teardown

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Problem description

When the main board of the document camera cannot talk to the camera head, it will not finish its startup sequence.

Symptoms

Detail all measurable or observable symptoms in this section.

• After pressing the power button the power led correctly starts flashing, but
• The flashing never stops, and the document camera doesn't start functioning

Solution

Diagnostic/Repair Steps

Figure 1 - The first connector to check

Figure 2 - The second connector to check

The most likely reason this can happen is that one of the connectors gets disconnected, either on the main board, or in the camera head. The connector in the camera head is more likely to become disconnected, however as a first step it's recommended to check the connector at the main board, because it's easier to disassemble the base of the camera.

Diagnostics and repair involves disassembling the device, and re-seating the connector.

1. Disassemble the base of the device
2. Check and re-seat the connector on Figure 1
3. If the device still doesn't turn on, then:
4. Re-assemble the base
5. Disassemble the camera head (this is more difficult)
6. Check and re-seat the connector on Figure 2
7. If the device still doesn't turn on, then it may have a more complicated fault