Yes it should remain ON>> LED #4 OFF means the Computer and LCD panel are NOT communicating with each other... www.orlogicrepairs.com we fix all apple computers in va md dc

Connect it to a computer does it respond or does the computer see it? if not and its completely dead . Check battery connection or disconnect the battery and reconnect it. Than connect it to your charger. If problems still persist than your looking at hardware issue. -Your electronic guy http://www.orlogicrepairs.com MacBook Repairs in VA MD DC

if your handy with a tools and have access to home depot. Grap some denatured alcohol and toothbrush(assuming you dont have an ultra sonic cleaner) . Disassemble the phone and look for signs of corrosion . More than likely you will find it on the screen or digitizer's connector or the main board. Clean with denatured alcohol with toothbrush . Brush all connectors throughly as well as the main board itself. Let it dry and reassemble and test. If problems still persist you might require main board repair or new digitizer. - www.orlogicrepairs.com MacBook repairs in VA

It all really depends on what OS your running. If your on windows 8/10 you can hold down the shift key while you click on Restart. Let it restart while still holding shift key and you should be see a blue screen with advanced options. From their you can reset/restore your device. If it is windows 7 or lower you can usually press either F4 or F8 when you power on your device and it will take you to a Restore screen.

When certain programs don't run properly it can be due to a number of software related issues. Are you experiencing any other APPs not opening up? If its just isolated to only Google Chrome I would uninstall it and try a fresh reinstall of it. If that does not help or you are experiencing other software glitches. I would run Malwarebytes Free verison to rule out any malware related glitches. -Mohamed http://www.orlogicrepairs.com MacBook Repair Specialists

Best place for iMac parts would be usually on eBay. Have you attempted a search there? -Mohamed http://www.orlogicrepairs.com MacBook Repair Specialist in VA, MD, DC