My inspiron laptop wont turn on after I replaced

Hi,
Take the battery off completely and drain the flea power from the laptop by holding down the power button while the battery is off. Hold down the power button for about 15-20 seconds to ensure no power remains on the laptop. Check if your battery has a drain button too. Drain the battery and place it back on the laptop.
Charge it for about 30 minutes before you turn it on. See if it works.
Post here if you need further help.

Check if WiFi is ON. If ON and still not connecting, power cycle router as well as the laptop. Unplug them from their power sources for atleast 30 secs.Plug power cord again, and try connecting.

Here are some basic no post troubleshooting tips
http://www.fixya.com/support/r3581893-how_to_troublehoot_a_portable_compouter_

The battery is critically low, indicating that it is not getting a charge from the AC adapter. If the system will not power on from the AC adapter, then the motherboard power connection is suspect.

Motherboards are about $100 on EBay

There could e a problem with the battery. A fast check to determine whether you have a problem with the power adapter, power cord or the laptop's battery is to turn off the laptop, remove the battery, connect the power adapter, turn on the laptop & see if it works.
If the laptop works directly from the power adapter with the battery removed, then the power adapter is good. In this case we can suspect that the battery is defective & needs to be replaced.

Try also to reseat the main components of the notebook: the battery, the AC adapter, the memory modules, & the hard drive.
After that try switching it on & see if the problem was fixed.

check if the power ac adapter pin the goes to the side of the laptop is damage, if not then try connecting ac adapter with laptop to a diff power wall socket, if fails then replace the motherboard.

laptop dose not turn on but lights are on

Is the flashing orange light flashes quickly or slowly?

If the power light is on then the laptop is getting power.  Take the battery out and if the power light is still on when you push the power button then there is something else wrong with the laptop.  

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/larry_1fe25e09c54eece2

First remove the battery from the PC! Leave it off for a short period of time! about 2min. This allows the computer to erase anything in temporary memory. Place the battery back onto th PC and try to boot it up. The other thing you can do is boot the pc up with just the power cord in place. See if it boots just from the power cord. Sometime the batteries from dell causes the whole entire PC to become unresponsive.