Re: z4m plus, right out of box, dark lcd, all led's blink...
I work with these Printers all day long. This generally means that the mother board is bad. If this is fresh out of the box then I would get an RMA from Zebra and they will most likely replace the Mother Board for you at no charge.
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That model is an LED Backlit unit. The LED driver could be bad or there could be a power supply problem. Sometimes the problem is a cable connection. Is there an picture that you can see in a dark room? If you can see a faint picture, the problem is probably the LED back light.
These 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 stage 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. Viewing it in "Mosaic" or "Magazine" will make surf easy. http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience.
When the following situations, you need to replace the 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 http://www.lcdinverter.info/compaq-presario-cq40533tx-lcd-inverter-p-2632.html
When the following situations, you need to replace the 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
If your iMac backlight is out there are two possibilities. Either it has a LCD screen and the cold cathode lamp (a very thin fluorescent lamp) is broken or came to the end of it's usable life, or the high voltage power supply that drives it is bad. This is something the average user cannot repair so it must go to the shop for repair. If your iMac is the LED backlit version there are multiple LEDS that light the display so the entire screen being dark is not likely, only dark areas where individual LEDS have died, the power supply for the screen LEDS may not be working for some reason. At any rate it will have to go to the shop for repair.
You need to give a more detailed description of the problem. The LG 47LH90 is an LED backlit TV with 'local dimming' technology. This means that there are lots of white LEDs behind the screen and these can be controlled in groups to allow localised areas of the screen to be dimmed to produce better contrast between light and dark. It is very likely that when the room is dark, this local dimming is more noticeable. The actual individual LEDs cannot be controlled and so the area that is dimmed will generally be greater than the area that is required to be dark 'blooming effect'. In addition, LED backlit displays only maintain their contrast through a tight viewing angle. If you sit too farto the right or left, then light from non-dimmed LEDs will leak through and the screen will look lighter. In short, there may not be any fault with your TV.
That is correct about the SSB. Now before we go any futher is this set still under warranty? If so or if it is just a little out like a couple of months contact Philips @1-888-744-5477. PS. on the front of the set where the power button is how mant times do that led blinks.