You should angle the screen towards the light to see if you have a faint image on it. If so, the problem is more than likely a failed inverter, or CCFL lamp on the LCD itself. Either in which would have to be replaced. The CCFL lamp unfoutunatly part of the LCD it self and cannot be replaced seperate the screen. The inverter can be replaced easy as it it right under the screen. Symtoms of a failing CCFL could be the white comes out as red on the screen for the 1st 10 sec or so of startup. This will put alot of stress on the inverter causing the inverter to overheat and shut off. I have one to where the CCFL failed and am trying to find a replacement. Good luck
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First, restart your tablet. A tablet is a computer, and any computer needs a reboot every few days. Second, check the volume settings. You may be able to increase the volume and hear just fine. If your speaker is bad, you could use a bluetooth speaker or headphones to listen to sound. Also, try different content, sometimes videos do not have sound. I hope this helps.
Now Jennifer, do you mean the sound or the volume controls? I assume you mean the sound. In that case, can you hear anything when you plug in headphones? Is there a little headphone icon displaying on the screen? Can you make the volume bar display and move it up and down?
In Settings > Audio Profiles, you can choose ringtones and such, and set the volume levels of various audio sounds. It will also play a sample of ones you select, which is a quick way to see if the audio works.
You can install the "Z-Device Test" app from the Play Store, and it tests all sorts of things on your android. Maybe it can help.
It sounds as though the switch on the phone jack is not making connection when the phones are unplugged. You can probably clean it by spraying some contact cleaner in the jack, then plug and unplug the phones several (lots of) times. I've had good success with WD40, but it does leave a residue. If this does not fix the problem, you can open the tablet by gently prying the screen off with thin blade (a knife might work). Work your way around the entire screen until the body separates. Gently open and perhaps you can access the jack switch to clean it, if it is not sealed. I hope this is helpful to you.
This sounds like a serious internal malfunction ,,im sorry i dont know your model exactly,,i dont think you actually need to " heat the chip" they do function at no to low temperatures.you describe really a ram memory malfunction which may need just changeing ,sounds like a curious problem. good luck anyhow Davey Snake!!
Sounds like a video problem with the GBA (grid Ball array) The HP pavilion tx series are notorious for this problem. The solder on the bottom of the video circuit crystalizes from the heat (these laptops run hot) and then it doesnt make a good connection. You have to reflow the solder (usually means taking apart or sending to a shop). But I found a quick and easy fix for them, I fixed about a dozen already like this in my shop (I own one too) Turn on laptop..then wrap it in 2 thick towels so it will get hot..sounds crazy, but it works..leave in towels running for about 30 or 40 minutes, then unwrap the laptop, power it off and restart it..bet it works!!!
You can update graphics driver, if that does not fix the issue check the display on external monitor. If the external monitor works fine you can isolate checking the display in BIOS Setup scree (Restart your computer and keep tapping F10 to getinto BIOS). If the same issue in BIOS, you may have to change display of the unit.
Right click on the computer's destop and view the display properties. Under the tab where you can alter resolution you can manage multiple monitors, It sounds like your laptop is setup to display through it's external VGA by default. Click on the two squares it shows and try to set your main screen as default.