Question about Scanport H21 21" LCD Display Monitor

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Scanport H21 problem.

Monitor turned black in 5-10 minutes after normal start. Green light is flashing. Power supply has outputĀ voltage up-down (both +5v and 12v). Power supply was fully tested outside the monitor (works absolutly normal). After disconnect from the power can be turned ON again in half hour with perfect image. Thanks for any input.
Serge
shapiros@thirteen.org

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Fried chips? Tech with electronic repair requested.

Posted on Sep 08, 2017

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MicrowaveSvc
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SOURCE: H21 LCD Monitor -No display

With that many boards, it probably has a separate ballast (inverter) to run the lamps. In the power supply section, I would look for bulging electrolytics and bad connections. In the ballast I would suspect a shorted output transistor, a bad output transformer, a bulging capacitor or bad connections.

Posted on Jan 21, 2007

  • 1 Answer

SOURCE: Need power supply board for H21 LCD monitor

H-21 scan port Dark Screen, If you unplug the green light flashes 2 or 3 times ending any activity until completely unpluged and plugged in again. My other scan port works fine using 1st monitor cables. I've used both ports on the graphics card. It's definately the monitor power supply or other componant.

Any ideas?

Bill

Posted on Nov 25, 2008

  • 1 Answer

SOURCE: Scanport N7 LCD Monitor won't stay on

it seems a whole lot of people have moniters with fatal ailments as i do as well. after spending $ 150.00 at computor stores & still had the same problem with my Moniter I just orderd another new moniter & the Problem is fixed..

I Think there killing moniters on purpose

Posted on Jun 17, 2009

  • 1684 Answers

SOURCE: how can i get a power cord for a scanport 17

Hello,

We carry the cords on our web site at: www.ccl-la.com

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Posted on Dec 29, 2009

prashanthcl
  • 460 Answers

SOURCE: power cord working but monitor not on

Your monitor has any hardware issue.you can check it from service center

Posted on Mar 24, 2010

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I have an older Cisco Systems power supply. output: +5v--3.0A,+12v--2.0A,-12v--0.2A, Max 30 W. I want to make silver water and I want to know what color wire is the +12v. theres 1 bare silver, 2 black,1...


power up the power supply an use a multi-meter to measure the voltage between the black wires and the other colored wires to determine the voltage on each of the colored wires.

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hi... hope this can help....it's the most common for any power supply...RED is for +5V DC, BLACK is for Ground, yellow is for +12V DC...GREEN is for earth ground...in cases for a 12V output adaptor redi is the 12V and black for ground..pls. don't forget to rate and vote ...thanks......

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Start up light flashes once and it won't power on


Most probable cause is the power supply. Look at the back of the computer, check the voltage settings located near the power cord. This will be the small red tab indicating two different settings, If your in the US it should be set to 115. Also, the power supply should run the internal fan when it is turned on.

To test the power supply try this:

Open your computer case and locate the gray box that is the power supply unit. Trace the wires from the power supply to the boards and devices and disconnect all the cables by unplugging them.

Find the big connector plugged on the the motherboard, make sure it is disconnected and short the two pins: (GREEN & BLACK) Short green pin (14) to GND (any black) to switch power supply ON, disconnect green from GND to switch OFF.

This will switch the power supply, you should hear or see the fan in the power supply spin. If you do not see the fan spinning, and your sure you have shorted the correct wires, you have a faulty power supply. If you see the fan spinning, you can now test the voltage coming out of the power supply.

Place a volt meter on the following colors to test voltage:

The color code for the wires is: Red = +5V, Black = Ground (0V), White = -5V, Yellow = +12V, Blue = -12V, Orange = +3.3V, Purple = +5V Standby (not used), Gray = power is on (output), and Green = Turn DC on (input).

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Green flashing light


Remove the PSU. If you have another one of equal (preferably larger) power output, then replace it and connect it like you normally would (sata connectors, aux 12v 4-pin, molex hdd connectors, etc...) and see if it works.

Its most likely that one of the 12v or 5v rails has burned out or that the entire unit itself is burned out. Either way, its done in. You'll need a new one.

May 22, 2010 | Bestec (ATX100-5) (ATX1005B) Power Supply

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Green lights...no power. HELP!


This could be a problem with your power supply. If the motherboard sees that the voltages from your power supply are low, it will turn itself back off.

You can test your power supply by unplugging all of your internal power cables, ground out the green wire on the 20-pin/24-pin ATX connector and check your yellow (12v), red (5v) and orange (3.3v) wires. If the voltages come back more than 10-15% off, you will most likely need a new power supply.
Even if you have good voltages using the test method above, it is only an indication that your voltages are good at zero load. Your power supply may still fail under normal load. If you have recently added any hardware to your computer, remove it and try again. If this still doesn't work or you haven't added any hardware recently, replace your power supply.

May 13, 2010 | Computers & Internet

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My computer just died the morning. I removed the


red- +5v
yellow- +12v
orange - +3.3
black- 0v
blue- -12v
white - -5v
green - ps-on(+5v)
gray- power good(+5v)
purple- stand by (+5v)
disconnect smps from motherboard give the power to smps and short green and black wires and measure the above voltages

Mar 19, 2010 | Antec SmartPower 2 SP400 400-Watt Power...

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Pin Name Color Description


Yes this is a good list of the voltages to be expected from a newer power supply on just the main header

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Power supply


ATX Version 1.2 - 20 wire motherboard connector Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 3.3V 3.3V Gnd 5V Gnd 5V Gnd P_OK 5VSB 12V Oran Oran Blk Red Blk Red Blk Gray Purp Yell Oran Blue Blk Green Blk Blk Blk White Red Red 3.3V -12V Gnd P_ON Gnd Gnd Gnd -5V 5V 5V Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pin 17 Pin 18 Pin 19 Pin 20 The color scheme used for the voltages in the 20 pin connector holds for the other ATX standard power supply connectors. However, brand name manufacturers often build proprietary power supplies or make up their own color coding, so I wouldn't throw out a power supply that supplies 5V where you think it should supply 3.3V. It's more likely a proprietary design than a failure.

Feb 21, 2008 | Computers & Internet

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