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If it's a newer tablet it should be rechargeable. And a red battery light indicates the need for it to be charged. On one of the side edges of the tablet there should be a micro USB or other port for a charging chord to plug into.
There should be a tiny reset button or pinhole (use a straightened out paper clip). If reset button/hole itself does not work, try pressing it while holding down the power button at same time. Otherwise, it sounds like you have a battery/charging issue (try another charger cord if available).
please let me help. the ac adapter will plug into the back of the latop.
check lights then if red light still on after one hour plugged in then you need new battery.try this if two green lights only on after, you do not need battery.
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
To confirm that indeed you laptop CPU is working normally, you can try plugging an external monitor. This will also verify that your onboard video or memory is not the issue.
Assuming you have tried the above, as to the screen flashing, it can probably be the LCD panel display. It can either be the video converter or your backlight inverter (or CCF fluorescent tube). Any of the two would require opening the display panel and component level repair. Should you not be comfortable cracking the display open and circuit analysis/diagnosis, you may need the services of a qualified professional.
Hope this give you an idea and work out for you. Good luck and post again how things turn up or if you need further information. Kind regards.