I have even tried running it with power only (no battery) but same behavior. I tried removing the battery and draining it by keep holding power button and then putting the battery back on. this continues for ever till I shut it down. at the same time even the screen switches from pitch dark to little less dark (may be just 2% better contrast) and then back to pitch dark. The Keyboard lights also go on and off with an interval of about 5 seconds or so. On pushing the power button on the side the keyboard lights up but nothing comes up on screen (no Dell logo. Contact Dell customer service or a local computer service center for assistance recovering your hard drive.I have dell inspiron 13 (7000 series) that I bought in Dec 2015. If you suspect there's a problem with your hard drive, turn your laptop off immediately and don't repeatedly try to restart it, because continuing to use a damaged hard drive can make it more difficult to recover data from it later. If you see an error message like "no boot device found," the laptop's hard drive might be corrupted or has failed completely. You might be able to partially start your laptop, but perhaps you get a serious error when Windows starts to load. Reinstall Windows or replace the hard drive You can also disable software that runs at startup to see if there's a conflict preventing your computer from booting properly. Try booting to safe mode, and if that stripped-down version of Windows starts, run antivirus software to see if your computer has been compromised. If your laptop powers on but then freezes after the Dell logo screen or crashes while trying to boot to Windows, software might be at fault. It will take a few minutes for the test to complete, and make a note of any issues that the test identifies. Use the trackpad or arrow keys to choose Diagnostics and run the test. After a few seconds, you should see the BIOS boot screen. To run it, press the power button and press F12 repeatedly when the Dell logo appears. Run a diagnostic testÄell ships all modern laptops with an integrated diagnostic test which can point you toward the root cause of major problems. If you're comfortable working inside your laptop, you can test it yourself using a multimeter otherwise you should take it to a local laptop repair shop. If you press the power button and no lights come on and you hear no sound (not even the laptop's cooling fan), it's more likely than not that the power supply has failed. Try plugging the laptop into the wall (don't rely on the battery). There are a lot of potential hardware problems that can cause the laptop to fail to turn on properly, but if the laptop does absolutely nothing when you press the power button, even after a hard reset, it's a fair bet that the power supply has failed. But you will probably need to take your laptop to a repair shop to fix this issue. Try performing a hard reset (see the next tip) and run Dell's integrated diagnostic test (see below for that as well). Unfortunately, this is often bad news - it generally points to defective hardware inside the laptop. Usually, you'll still hear the fan come on, but nothing will appear on the display. If you try to turn on your laptop and hear a sequence of beeps or see a series of keyboard keys flashing (usually, the Scroll Lock, Caps Lock, and Num Lock), the system's self-test (commonly called the POST) has failed. You see unusual flashing lights or hear beeps No matter what's keeping your laptop from powering on, here are seven of the most common ways to troubleshoot your Dell laptop and solve the problem as quickly as possible. The problem might even be software-related. Your laptop could be suffering from a power failure, a hard drive glitch, or some other internal hardware problem. If your Dell laptop won't turn on, it might not be immediately obvious what the problem is.
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