Question about Xerox Phaser 7760 Laser Printer

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Fault 004-350 i had turned the power off and back on but i have the fault 004-350 which i looked up and it says marking device video failure

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Here is a link for the Phaser 7760 service manual:

Xerox Phaser 7760 Service Manual

004-350 Marking Device Fail (Controller Video)

Posted on Jul 06, 2014


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I have a Samsung television that powers off almost 3 minutes to the second after I turn the t.v. on. It turns itself back on, but continues to power off around the 3 minute mark repeatedly.

The power supply in the television is faulting under a load. There is a fault with the TV after the power supply or with the power supply itself. The power supply is a 'switched mode' type and will shut down and then recover under a fault. Therefore it will continue to 'cycle' if the fault is still present. Samsungs are renowned for doing power supplies but a new board could be a costly guess if it is not the reason. Sorry, I know this probably doesn't help much, but, with all electronics they are good when they work but are a costly headache when they don't. If the set is old it is probably better to look at upgrading. Cheers

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Those blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices.

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What could be wrong with my TV? The audio and video suddenly cut out.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience.
Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD screen are similar, irrespective of its brand and screen size.

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1 Answer

Fault code 004-350 marking device failure

Sorry, Phasers need more than one minute to reset. You need to turn off and unplug the printer for 30 minutes, then plug it back in and power it up. That might reset the printer.

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Sanyo DP 42849 42'' lcd tv no audio no video

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

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1 Answer

My tv won't turn on...the red light indicates that it's plugged in, but everytime i press the power button, i get nothing! can someone help?!

If warranty no longer valid, the first printed circuit board I would investigate is the one with all the aluminum heat sinks on it!!! It's called the "switch mode power-supply" !!! Power supply detects a "fault condition" and goes into "shutdown mode" to save itself from catastrophic component failure!! e.g. smoke, sparks, fire. Same typical failure modes occur in CCFL back-lit lcd computer monitors. You will need to visit YOUTUBE for video clips of "lcd monitor disassembly" and "lcd monitor repair" and after that move up to CCFL lcd tv repair videos to know just what to "LOOK" for on the smps board. Good luck with your unit. 12fixlouie

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How to locate fault in case of hardware failure in windows xp professional?

On your Desk top screen, look for MY Computer. Right Click and from drop down box, select Manage.
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Hi , here are the codes. listen closely.


Error Message

1 long, 2 short Video adapter error Either video adapter is bad or is not seated properly. Also, check to ensure the monitor cable is connected properly. Repeating (endless loop) Memory error Check for improperly seated or missing memory. 1 long, 3 short No video card or bad video RAM Reseat or replace the video card. Repeating High/Low
CPU Either the CPU is not seated properly or the CPU is damaged. May also be due to excess heat.
Check the CPU fan or BIOS settings for proper fan speed.
Phoenix BIOS beep codes

Beeps Error Message Description 1-1-2 CPU test failure The CPU is faulty. Replace the CPU. Low 1-1-2 System board select failure Replace the motherboard. 1-1-3 CMOS read/write error The real time clock CMOS is faulty. Replace the CMOS if possible. 2-x-x RAM failure Replace the RAM module if possible. 3-2-4 Keyboard controller failure The keyboard controller has failed. Replace the IC if possible. 3-3-1 CMOS RAM power bad Replace the CMOS battery or CMOS RAM if possible. 3-3-2 CMOS configuration error The CMOS configuration has failed. Restore the configuration or replace the battery if possible. 3-3-4 Video memory failure There is a problem with the video memory. Replace the video adapter if possible. 4-3-1 RAM test failure System RAM addressing circuitry is faulty. Replace the motherboard.
Good Luck


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1 Answer

50 in LG turns on and then clicks and turns back off

The power supply is going in to protect mode. Most often this is a power supply failure, or a failure on one of the circuit boards that is causing the power supply to go in to protect.

If the power supply fault is not too complicated an experienced tech may be able to service it without changing the compete circuit board.

The tech will service this by substituting boards to determine where the failure is occuring. Then he will change the board to fix the fault.

Jerry G.

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My PC stopped booting up yesterday. When turning it on, you can hear everything powering up (fans working, hd's going, lights on case and mobo etc) - but after 3-6 seconds it turns itself off. After...

Replace the PCI-E video card. If removing the card causes the system to POST, then it is very likely the card is the fault.

The only concern is CASCADE failure. This occurs when the expansion card damages the slot it is installed in, then when the card is replaced, the slot damages the new card, causing a chain of failures.

You still have a pretty good chance that replacing the video card will resolve without further expense.

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