Question about Samsung SGH-A300 Cellular Phone

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External display light

I want to know haw can i turn on the external display light

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I buyd an oder cellphon :(

Posted on Sep 20, 2008


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Technician can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Technician (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


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Screen lights up, but no display dell precision m6300, display with external monitor


Looks like the LCD screen has gone bad as you are getting the display on the external Monitor.
Try This to run a test to check if it would still work or not:

1. Turn off the Laptop
2. Press and Hold the D key on the laptop and then press the ower button to turn it on..
3. Leave the D key when it starts

This would run the check on the Laptop and if you see the color bars then the LCD is fine, if not then you would need to get it replaced.

Check this article for more info about this test:

Anand Knowledge Base

Sep 07, 2014 | Dell Precision M6300 Notebook

1 Answer

Hp 6715b vga's to external display fine, but no internal display. Replaced display cable, inverter, and lcd is good, I know this as fact ! Still no display, HELP ?

Hi, First push your FN- and the F- button that has the display symbol it may be set to the external screen. Can you see anything on the screen if you hold a flashlight close to it? If so I would say your back light went out and will need to be replaced. If this is not the case, recheck your cable and make sure it is grounded properly.
Also check the sleep button, This should be located above the keyboard. Sometimes it gets stuck.

Oct 19, 2013 | HP Compaq 6715b Notebook

1 Answer

My emachines D620 is turn on but not displayin on screen

Hi Mark,

From the scant details provided, the best solution I can offer is that the back light has burned out. To verify this, turn on the monitor. Shine a bright flashlight at the screen. If you can see stuff on the screen, e.g. Desktop, boot sequence, anything else. That would confirm a problem with the back light. What most LCD monitors do is have a light behind them or along each side that make the screen shine. What normally happens is after a long time the tube burns out. if the system is only a couple of years old, then most likely the inverter that steps up the battery voltage to higher voltage to run the tube has failed. In either case, IF you can see a display with a flashlight, then you will most likely have to replace the display. You can buy a completely built one from emachines (now a gateway company) or if you have the skills, replace it yourself. I found on ebay new displays for under $100

Sadly the other thing that happens fairly often now is that the graphics chip overheats and becomes "unsoldered" in which case you will have no display when shining a flashlight at the display. You can also confirm this by trying an external monitor. If you have another monitor for a desktop or if a friend does, you can plug in the monitor and see if you get a display. You may have to tell the laptop to use the external monitor by pressing the Fn key and the display function key. The display function key will have a picture of a monitor on it. Or you can look up the correct key sequence in the user manual which can be downloaded from emachines. The external monitor will also help confirm that the built in display is the cause of the problem if you can get a display on the external monitor.

If you need more help, let me know the results of the flashlight and external monitor tests and what further help you would like.'

Thanks, Jim

Feb 21, 2013 | eMachines D620 Laptop

2 Answers



Welcome to Fixya. I would like to know when you turn the laptop on is it running? Can you see the light that indicates that it is on?

We need to check if this is caused by a LCD or motherboard issue. If you can connect an external monitor on your computer and tap FN + F5. This will toggle the display. If you will be able to see the display on the external monitor it means that the problem is the LCD but if not then the problem is the video graphic that is embedded to the motherboard and to be able to fix it is to replace the motherboard itself.

Please let me know if you have questions. Thanks for using Fixya.

Jul 19, 2011 | Acer Aspire 5241 5251 5332 5334 5338 5516...

1 Answer

My Dell laptop turns on however the screen does not. The battery light keeps flashing. I charged it for 2 days straight and it did not work. Lights and everything else turns on except the screen. The...

Hi, what i would suggest is to use an external monitor and if you can get something on your external monitor, reseat the lcd cable or display cable refer to this website for instructions ( - if still same - the lcd has got to be replaced.

Nov 10, 2010 | Dell Latitude D620 Notebook

1 Answer

Hi ive got a dell studio laptop the laptop powers up but nothing comes on the screen. The screen is less than 12 months old

HI there.
Try this things first so that you can check if it is really the screen that's causing the problem,
While the computer is off, press D+POWER button and hold it for 5 secs, different colors should come up,
Make sure the computer turns on. You will know that if the power button lights up. Try to lug in an external monitor and see if display will come up,
If the display comes up, and the d+power did not display anything, might want to call technical support so you can get the screen replaced,
Have a good day!

May 27, 2010 | Dell Studio 17 Laptop

1 Answer

Model 542-B11 External signal won't display (settings menus work)

Hi there,

Well first of all yo can try to reset your TV, just turn it off for more the 24 hours and then turn it on again, it helps you to reset your TV. (turn off your TV from main housing not only from the TV power button).
Let us know if this helps....

Good Luck!!


Dec 14, 2009 | Televison & Video

1 Answer


This is simple on the dash board in your cluster area, there is a rest button, like to one you use to rest trip mileage. Turn you ignition on to the for position, that without the light in the cluster are on eg the abs light and stuff like that. Push down on the reset button for 10 seconds. Still holding the rest button turn the ignition on to the 3rd position this where the abs lights and other come on in the cluster area. Hold for another 10 seconds. Then release the light should go out when vehicle is started. Good Luck

Dec 10, 2008 | 1998 Honda Accord

1 Answer

Lexmark E 120


Jan 12, 2008 | Lexmark E120n Laser Printer

2 Answers

Samsung D820

Here are some codes for your phone....try the first one

*2767*688# = Unlocking Code *#8999*8378# = All in one Code (EDIT) *#4777*8665# = GPSR Tool (EDIT) *#8999*523# = LCD Brightness (EDIT) *#8999*3825523# = External Display (DOES NOT WORK) *#8999*377# = Errors (EDIT) *#2255# = Call List (DOES NOT WORK) #7263867# RAM DUMP ON/OFF (DISPLAY) #*5737425# JAVA SERIAL (DISPLAY) *#8999*5282 JAVA TRACE (EDIT) *#87667# DEBUG MODE (EDIT) *#87927# WAP BROWSER PROFILE (EDIT) DON'T CHANGE UNLESS YOU KNOW WHAT YOUR ARE DOING #*3888# BLUETOOTH TEST (DISPLAY) *#232337# BLUETOOTH MAC ADDRESS (DISPLAY) *#8999*636# = Have no clue what it is, i see 20 lines *#9999# = Software version *#8999*8376263# = HW ver, SW ver and Build Date *#8888# = HW version *#8377466# = Same HW/SW version thing *#7465625# = Check the locks *7465625*638*Code# = Enables Network lock *7465625*782*Code# = Enables Subset lock *7465625*77*Code# = Enables SP lock *7465625*27*Code# = Enables CP lock *7465625*746*Code# = Enables SIM lock *7465625*228# = Activa lock ON *7465625*28638# = Auto Network lock ON *7465625*28782# = Auto subset lock ON *7465625*2877# = Auto SP lock ON *7465625*2827# = Auto CP lock ON *7465625*28746# = Auto SIM lock ON *2767*3855# = E2P Full Reset *2767*2878# = E2P Custom Reset ^also one time unlock put the non t-mobile sim in the turn it on and type this code to unlock till the phone turns off *2767*927# = E2P Wap Reset *2767*226372# = E2P Camera Reset

Dec 06, 2007 | Cell Phones

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