Question about Xerox XG-71D 17" Flat Panel LCD Monitor

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Xerox LCD Monitor Won't Power On - PSU Tests OK

Hi, I read the other posts pertaining to this type of problem and eliminated the possibility of the power supply being the culprit here. I get no power on light on the monitor - nothing. Previously worked, then I moved and now nothing. I'm not aware of it being damaged in the move. Any other suggestions?

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  • Anonymous Mar 06, 2008

    I have the same issue. I get a flashing green power light, but the screen stays black. Don't want to pay $100 to get it fixed, but if it is the power supply, any guess on how much that is?

  • dub1969 Mar 18, 2008

    I have the same problem. The power suppy is like $35 on ebay.

  • Anonymous Apr 20, 2008

    I have the same problem but when you unplug the digital cable not the analog one. The analog by it self works.



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I have a flashing light.I am going to replace the PS and I will repost

Posted on Mar 18, 2008


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Multiple motherboard failures

So I think you can conclude the that the first motherboard was actually ok, so don't trash it :)
Just to more certain about your PSU you might test it with a PSU tester, from $20 upwards from Amazon or ebay. This won't actually tell if everything's ok with your PSU, but if there's something wrong, it may show it (fail=something wrong, pass=there might be something wrong).
OK Brian, I have two ideas, which you may have already eliminated.
The first idea is that the problem is thermal; that maybe your processor was overheating. This idea is made less likely by the fact that the second m/b also shows a problem, but does not eliminate it entirely. The TIM on your CPU may have become old and developed voids in the first case, in the second, is it possible that you didn't do the best job in mounting the CPU heatsink ? You are obviously competent to remove to remove a motherboard, and so I expect you thoroughly cleaned your PC of dust, including the CPU heatsink and PSU where possible in static-sensible fashion. You should install some temperature monitoring software to check this hypothesis. Quasi-real time monitors include Speedfan (which also has a graphical display showing temps for the past 15 minutes, but it can be difficult to work out what the readings mean), and coretemp, but I'm sure there are others. Sandra will give you temperature but takes a couple of minutes to update, Speccy might give your CPU temp but it doesn't give mine (HP specs for this model do not give a unique CPU) . Look up your CPU's max. allowed temperature on the AMD website. You might also try CPUworld.
The second idea is that your PSU is overheating (some PSUs have thermal sensors which shutdown the PSU if it gets too hot), or that your PSU simply not upto the job. It depends what you are doing and what your system configuration is (including peripherals). According to the system under test with HD4350 graphics card, which is one of the options for your model, draws 165W at idle and 195W under load; this should be compared with your PSU (which if it's the original) is rated at 220W. Put a couple of extras in that, and take into account that the PSU isn't able to give as much power as when it was new, this scenario is looking like a possible candidate. You can eliminate this by trying a different, working higher power PSU if you can find one that fits - about 500W (true, not claimed or peak) capacity (to estimate the wattage the PSU you need for your system, see (newegg and some PSU manufacturers also have them).

Of course it might be one of hundreds of other causes,,,

You might try posting your problem in the HP support forum, and hope that some HP guru picks it up.


May 01, 2014 | Intel D915GAG Socket 775 Motherboard -...


How to test an LCD TV or monitor PSU and inverter


Before proceeding I assume you have technical training along with the multimeter. A full testing must be done with power on, and for safety reason must not be done by an untrained user.

The tip contains only general indications. The reader is supposed to have the training to apply in practice the testing method below.

If there is no power at all, then the responsible is almost always the PSU.

When there is no power, test AC in to PSU. If there is no AC in (read volts, or read ohms on power cable), that means that the power cord must be replaced.

If there is AC in, then test the PSU section near to AC input. You always find a resistor or a fuse in there . Check if it has blown.
After that you test the rest of PSU component. If there is no power at all , and problem is not power cord, it is often possible to spot at a glance a leaky or bulged capacitor.

If there is power, but the monitor stays in standby, then te PSU is forced to low voltage only by controller board. This happens when a fault had been detected.

In this case testing the PSU becomes more complicate. The technician must locate the control lines from controller board. This control lines operate at lower PSU voltage (often +5V), and turn on higher voltages on PSU board.

The inverter may use for example a +20V line from PSU. The +20V line is turned on by the controller board, closing a +5V control line to PSU. When PSU is in standby mode, the technician testing the PSU must bridge the +5V line with the PSU low +5V circuit, and test if the +20V line to the inverter gets turned on.

As explained this kind of test must not be done by the unexperienced user, as the chance to waste the unit beyond repair is high, and there are also many safety concerns.

After testing the PSU, next part to test will be the inverter board.

The inverter is tested reading DC voltage in from controller board, and AC out to back light system.
The inverter is an high voltage board, remember, safety first when testing AC circuit.

If the inverter has no DC from controller, then test PSU, if PSU is OK, and inverter has still no DC in when PSU line to inverter is on, then replace controller board.
If the inverter has DC in, and no AC out, then replace the inverter.
If the inverter has DC in and AC out when higher DC voltage to inverter is turned on, then test at component level the main controller board, and if present test LCD controller.


on Mar 03, 2010 | Televison & Video

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Dell Inspiron MINI 1012 Laptop Screen 10.1 LED flickers


It sounds as though the video card has gone bad in your system. There are a couple of things to try to eliminate the lcd.
If the LCD on the system shows no display or has other problems, here are some basic steps to take:
  1. If the LCD is not displaying any video, connect an external monitor to eliminate a no-POST problem. A good image on the external monitor eliminates a video card problem or a POST problem.
  2. Connect an external monitor when possible for all LCD-related problems to help eliminate a possible software or video card problem.
  3. If the LCD has lines on the screen, check the system during POST as well as system setup to determine if the lines are present in all modes of operation.

    If you cannot get any video by connecting an external monitor then your motherboard will need to be replaced. The reason for the motherboard replacement is because your video card is soldered onto the motherboard.

    Thank You,
    Dell-Jesse L
    Dell Social Media and Communities

Jan 11, 2013 | Dell Inspiron Mini 1012 Netbook

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E Motion LCD TV Model X26/29E won't turn on - seems stuck in standby (red light on). Remote control is OK.

My sisters e-motion lcd tv is locked in, standby mode. I think that replacing the psu (power supply unit) is the answer. but be careful of introducing static damage to the components as you can cause latent component damage and then future repair is not so easy to locate! always make sure that you fault find using the proses of elimination ie start from the begining !! Make sure you have a 240v supply going in and then probe for your outputs.. If your out put measurements are ok then you can eliminate your power supply unit as your problem circuit .....

Dec 05, 2012 | Televison & Video

1 Answer

My dell inspiron 6400 won't start, red light then green light flashes ansd nothing happens, try to take out the battery and putting it back, no results, help

The following troubleshooting guidelines are basic troubleshooting steps. Battery Charging It is recommended to charge the battery while the system is off for faster charge times. Users may notice longer charge times when the system is powered on and running graphics extensive applications.
No POST If the system does not perform a Power On Self Test, there are various things to look for:
  1. Check to ensure that the system has a power light.
  2. If the system has no power light, ensure that it is plugged into AC power. Remove the battery.
  3. If the system has power but is not performing a POST, check to see if the keyboard status lights flash to indicate a successful POST, but no video, or that the keyboard status lights are lit in a sequence indicating a system problem.
  1. With the power off and the system unplugged, remove all CRUs from the system and reconnect that AC adapter to the system and try again.
  2. Run the On Board Diagnostics (OBD).
Video If the LCD on the system shows no display, or has other LCD problems, there are some basic steps to take:
  1. If the LCD is not displaying video or the video is garbled, run the BIST Test.
  2. If the LCD is not displaying any video, connect an external monitor to eliminate a no POST problem. A good image on the external monitor eliminates a video card problem or a POST problem.
  3. Connect an external monitor when possible for all LCD related problems, to help eliminate a software possibility or video card problem.
  4. If the LCD has extremely dim video, attempt to adjust the brightness or connect an AC adapter to eliminate a power management conservation setting set in the BIOS.
  5. If the LCD has lines on the screen, check the system during POST as well as system setup to verify if the lines are present in all modes of operation. Run the BIST Utility.
  6. If the LCD has color problems, run the BIST Utility.
  7. Run the On Board Diagnostics (OBD).

Jul 19, 2011 | Dell Inspiron 6400 Notebook

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No response although light is on showing PSU is working

You can still ahev the backlight power supply problem because the 5vdc powwer supply for the logic board may be working but not the 12vdc section, or problem in the inverter circuits, lamps, etc.
If you are going to DIY and have proper tools and know safety precaution then please read on:
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply (they should be replaced in a set), blown fuses; poor solder joints, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed monitors to get some ideas what to look for:
Post back what you see inside so we can guide you further and it will help out other people in the future also.

Basic LCD monitor troubleshooting guide:

Capacitors kit: he can make you a set of caps for you.

Oct 08, 2010 | Xerox XA7-17i 17" LCD Monitor

1 Answer


Capacitor Lab Types of Capacitors Radial Electrolytic Capacitors

This explains the different configurations of capacitors. You have the wrong type. The voltage is not that big a deal as long as it is not a huge difference.

Mar 11, 2017 | Xerox XG-91D 19" LCD Monitor

1 Answer

My xerox lcd monitor is not working the power button is not lighting up

Computer Post / Beep codes The computer POST (Power On Self Test) tests the computer, insuring that it meets the necessary system requirements and that all hardware is working

POST troubleshooting steps. then this issue is not a NO POST but is an power related issue see document ... For users who are more comfortable working with the inside of their computer.

Good Luck, Please dont for get to Vote/Thank You.

Dec 22, 2007 | Xerox XG-91D 19" LCD Monitor

5 Answers

Xerox XG-91D 19 in. Flat Panel LCD Monitor

Just tore mine apart so here is some help. You need to remove the two screws on the back of the case on the bottom. Then you remove the front cover it slides toward the top of the screen then lifts off. You can pry it off if that doesn't work. If you want to seperate the screen from the back cover you then need to remove the swivel mount and the other two screws from the back cover.

Oct 06, 2006 | Xerox XG-91D 19" LCD Monitor

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