49.FF95 Service error in HP Laserjet 4350dtn printer. Pls help me what is the exact error.

49.XXXXX ERROR alternates with To continue turn Off then On 49.XXXXX ERROR alternates with To continue turn Off then On

Explanation

A critical firmware error has occurred.

Recommended action

1. Turn the printer Off and then On.
2. If the message persists, contact HP Support.

I would start by removing the old driver, and make sure the print Que is empty.
Did you upgrade the firmware? If not I would.

Does it give a 49.FF95? As their is no such error code "FF95" for a HP 2420. However I've seen 49. XXXX error codes before (XXXX meaning weird Alphanumeric Characters and numbers). This type of error code you can try a couple of Items:
1st - Perform a Cold Reset:
1. Turn the printer off.
2. Hold down the SELECT button, and then turn the printer on. Continue holding down
the SELECT button until all three printer control-panel lights flash once and then
remain on. This might take up to 10 seconds.
3. After the message SELECT LANGUAGE appears on the display, press the
UP ARROW button or the DOWN ARROW button until COLD RESET is highlighted.
4. Press the SELECT button. The printer performs a cold reset and then continues its
power-on sequence.
5. Check all I/O settings and reset any customer-set printer configuration values

If the machine still comes back to the Strange FF95 error I would start with the replacement of the formatter,
Part Number for the Formatter:
Network versions Q3955-60003
Non-network versions Q3953-60001

Hope this helps..

remove the network card at the back, re-insert or replace it...

Go to HP web site :
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=412123&prodTypeId=18972&prodSeriesId=416419&swLang=8&taskId=135&swEnvOID=54

download the newest firmware and upgrade the printer firmware.

You need to get a technician in. The code is suggesting the formatter board.
Note that make sure that the technician (or you if you are replacing it) that once you replace the board and turn on the machine, don't do anything for about 10 minutes. No printing, nothing. Take out the network/usb cord out to prevent anyone from printing. The reason is that the NVRAM (memory) is updating the new board with your information. If anyone prints (whether from a computer or a configuration page) then it will interrupt the update and you will get the same error again.

Go to HP.com. In the Support section you will find documents to help you troubleshoot this problem.

Hi hasan_taff:
What model HP is it?

Hello,
I have an HP Laserjet 2420 printer. And it's really bothering alot, it has an error 13.06.00 and also 13.20.00. What shall i do? I tired to clean the falg sensor and replaced the end sensor, but still there is no progress. Please i need help ASAP.

What make of printer, what model. Under what conditions does the error occur? Please give at least some detail.