No power issue

Issue description

When you turn the printer On
, the machine doesn't respond and the operator panel does not light up.

Troubleshooting

Step	Action
1	Check that AC line cord is securely connected to both the wall outlet and the back of the printer.
2	Ensure the power switch is turned on.
3	Ensure that particular wall outlet is good by trying some other electronic equipment functions when plugged into that same wall outlet.
4	Try another wall outlet, if possible.
5	Tap the touchscreen. If display lights-up, request firmware upgrade that includes this bug fix. Note: The screen should never turn off while booting; i.e., you should see the status bar crawling. Printer display temporarily goes black during initial power up for more information about this issue.

Still need help?

If you need additional assistance, please go to the Lexmark support site, type your printer model and locate Get in Touch with Lexmark!
for contact information. NOTE:
When calling for support, you will need the following:

Printer model

Printer serial number

Toner/imaging unit/waste toner bottle part number and serial number (for supply-related issues)

Please be near the product/s described in this article to expedite the support process and reduce callbacks.

LEGACY ID:SO6168

Step	Action
1	Replace the LVPS If display is dark or blank. if the cooling fans are running, proceed to step 2.
2	Remove printer's side cover on the controller card side.
3	Remove service door and check whether LED is lit. If LED is not lit, unplug J10, power cable to Scanner controller card. If LED lights, suspect issue with Scanner controller card or Front Panel Assembly. If LED does not light on System Card with J10 removed, replace LVPS.
4	Check Voltages on System Card for 3.3 Volts. If 3.3 Volts missing, replace System Card.
5	Check ribbon connectors between scanner controller card and controller card, replace if damaged.
6	Are LEDs lit on scanner controller card? If not, replace scanner controller card. If lit, try disconnecting J1 and J11. If panel lights, replace scanner controller card interface cable assembly.
7	Substitute in Front Panel Assembly; if the different Front Panel works, replace Front Panel.
8	If different Front Panel does not fix the issue, then replace scanner controller card.

Step	Action
1	Make sure that the printer is plugged in.
2	If the printer is still not powering up, check the power cord for continuity.
3	Replace the power cord if no continuity is detected.
4	Should the issue persist, check the AC line voltage to the machine. The voltage should be within the following limits: 110 V machines - 100 to 127 V AC 220 V machines - 200 to 240 V AC When the voltage is within the limits, then proceed to step 5. If not, try a different outlet.
5	Check the voltages on the pins of the LVPS card and make sure it matches the following information: +5V at pins 17 and 19 +24V at pins 11, 13, and 15 Replace the LVPS , if the voltages ae correct.

Printer Model	Part number	Description	Removal Procedure
Lexmark X654 and X656	40X4503	Operator panel assembly	Please check Service Manual link below for the FRU removal procedure. Lexmark X65x Service Manual
Lexmark X651 and X652	40X2149	Operator panel assembly
Lexmark X658	40X4504	Operator panel assembly
Lexmark X651 and X652	40X2074	Scanner controller card assembly
Lexmark X654 , X656 and X658	40X2075	Scanner controller card assembly
Lexmark X651 , X652 , X654 , X656 and X658	40X4493	Scanner controller card interface cable assembly
Lexmark X651 , X652 , X654 , X656 and X658	40X2171	Scanner Interface Card
Lexmark MS81x and MS71x series	40X7694	LVPS (universal)	Please check Service Manual link below for the FRU removal procedure. Lexmark MX710, MX711, MX717, MX718, MX81x, XM51xx, XM52xx, XM71xx, and XM72xx Service Manual