Dell 2135cn Service Manual page 429

Step
Checking the connectors for connection
Check the connections between the PWBA MCU and LED
ASSY ERASE.
Are P/J141 and P/J14 connected correctly?
8
Checking the HARN ASSY LVPS for continuity
Disconnect J14 from the PWBA MCU.
9
Disconnect J141 from the LED ASSY ERASE.
Is each cable of J14 <=> J141 continuous?
Checking the power to LED ASSY ERASE
Disconnect the connector of J14 from the LED ASSY
10 ERASE.
Is the voltage across P14-15pin <=> ground on the PWBA
MCU, about +3.3 VDC?
Checking the TRANSFER ASSY for connection
Open the COVER ASSY FRONT.
Are four HV terminals on the TRANSFER ASSY, and four
springs on the frame (PL4.1.11, 12, 13 and 14) dirty and/or
deformed?
11
Version 1 2008.02.01
Check
1 - 401
Chapter 1 Troubleshooting
Remedy
Yes
Reconnect the
connector(s) P/
Go to step 9. J141 and/or P/J14
surely, then go to
step 9.
Replace the
Go to step 10. HARN ASSY
LVPS.
Replace the LED Replace the
ASSY ERASE. PWBA MCU.
(Refer to Removal (Refer to Removal
12/ Replacement 31/ Replacement
48.) 29.)
Clean or replace
the TRANSFER
Go to step 12.
ASSY or
SPRING(s).
No