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30'LCD Monitor/TV seperate power box and seprate control unit

Monitor powers on and screen flashes on but right back off with power staying on.

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May or may not help, but try pressing the "source" button, after turning it on..

Posted on Mar 11, 2008

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6ya6ya
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Posted on Jan 02, 2017

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It has power but no sound and no picture. TV turns on and power button flashes about 12 times and then stays blue.


Hi Dustin,
If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
https://www.youtube.com/watch?v=TR2iWN6b-LY
LCD TV Repair No Power Power Supply Common Symptoms Solutions How to...

Apr 27, 2015 | LG 50PG25 50 in. Plasma HDTV

1 Answer

Desact monitor


When the following symptoms, that is, to replace a laptop LCD screen:
No image on the screen, but the power light stays on
Dark display but still readable
Between the screen flashes on and off 1/2 to several seconds
Power light stays on, but no display and sound
No image on the screen, but LCD TV still has sound
Picture cycle on and off, as well as high-power LED lights

Jun 07, 2013 | Computers & Internet

1 Answer

I have compaq tft5000 15" lcd monitor when we


It is broken. Replace it.

If you look online for a "previously-owned" 15-inch LCD monitor, expect to pay $20 to $30.

If you go to any "big-box" electronics store, you can buy a 19-inch LCD monitor for under $100.

Either way, it's much less expensive to REPLACE it
than it would be for a professional TV/video technician to try to trouble-shoot and REPAIR it.

Jan 07, 2011 | Compaq TFT5000 15" LCD Monitor

1 Answer

My akai lcd 32.5" tv will not stay on and all it does is flash the blue screen with akai then turns right back off and i was thinking power suply might be bad. what could it be?


You could be right it sound like the power suply, has it got a AC adaptor power suply,bit like a laptop charger? goes from mains to a black box then from box to the TV?
does it stay on at all?

Oct 01, 2010 | Akai LCT3285TA 32 in. LCD Television

1 Answer

Sony model # KV32S42. The TV started flashing when first powering up. The flashing would continue 4 or 5 times before TV would eventually stay on. The last time I tried to turn it on I heard a dull thud...


If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

Feb 24, 2009 | Sony KV-27S20 27" TV

1 Answer

Problems with Dell E176FP 17" LCD Monitor?


Hi,
Kindly disconnect the monitor from the computer and power it on , if the screen is still blurry on the self test feature check , the monitor is bad.
You can press the menu button on the monitor and select Restore to Factory setting or Factory reset option. If the problem persists you can call LCD repair
http://www.lcdrepair.us/
Monday to Friday: 8:30 am to 4:30 pm
Central Standard Time

Phone :
469-521-7517


If you have purchased,the dell monitor seprately from the computer, it carries a three year replacement warranty.


Thanks
proton

Nov 21, 2008 | Dell E176FP 17" LCD Monitor

1 Answer

No composite input signal


`Hi,
If the monitor is making the noise , the monitor circuit baord has gone bad.
If you have purchased the monitor on a seprate order from dell it would be covered under 3 yr warranty. If the same has been bought with the Dell computer , it would hold the computer warranty. would request you call the manufacturer.

Before you call Dell , you can try the following things
1. Disconnect call cables from the back of the montior
2. Press the power button a couple of times in the front of the monitor to drain any resident charge
3. Reconnect the power cable
4. check if you see the monitor self test running and if the noise is still there with there

Thanks
Proton

Oct 29, 2008 | Dell UltraSharp 1907FP 19" LCD Monitor

15 Answers

HPw19 monitor


If you are using a laptop, you might have pressed the button to switch from LCD to external display. The key combination depends on your laptop model, but it is usually Fn+F4 or some other function key. Look for a function key that also has an icon looking something like an external monitor. 48d40f3.jpg Try pressing function and that key a couple times to see what happens.

Jul 13, 2008 | HP w19 19" LCD Monitor

1 Answer

SDM-HS73P Screen Flashes


This is a problem I have seen with a few LG monitors.
Your Inverter circuit is fine (that powers the lights to your screen so you can see the image on the LCD panel) but the monitor does not like having a video signal attached to it.

  1. Bad capacitors on the power board can upset the current going to the controller board. This board included the video input circuit and the power supply needs to be stable for this to operate.
  2. The controller IC that translates the video signal into what the LCD panel controller can understand is failing. Normally this fault occurs in the horizontal and vertical input of the IC. The fact you can see the other message on screen is due to it going through it's own internal and seperate section of the IC. In this case the only repair option is to replace the internal video board. Sony will not supply the parts directly to the public, but if you are really nice, they "may" tell you where to get one externally to Sony.
Hope that helps =)

Apr 16, 2008 | Sony SDM-HS73P 17" LCD Monitor

1 Answer

Similar problem ... Help!


NO dont disregard the pwr supply,I would use the hot/cold fault finding aids first to isolate the problem aera. regards CHOOK.

Apr 17, 2007 | CTX S762A 17" LCD Monitor

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