Acer aspire pew71

Could be a bad windows install. Have you tried a reset?

http://us.acer.com/ac/en/US/content/drivers

http://us.acer.com/ac/en/US/content/drivers

Download it from here

pew71 ethernet software

on device manager you must uninstall wi-fi driver and then install again.if this not solve your problem change the wi-fi card ; on the back of laptop!!!

you need to reinstall your operating system your files are corrupt so it will stay in constant boot mode until you reinstall if it doesn't work let me know

For this kind of issue, please follow up the following steps to check:

1.confirm the battery and ac adapter connect the laptop normally.Maybe the bad connect lead to this problem. If there are no lights when you turn on laptop, one of possible reason is that your adapter is malfunction.

2.the second possible cause is laptop dc jack failure. If the dc jack is broken or loose, you are required to replace it or repair it.

3.Another possible reason is that there is something wrong with laptop motherboard. For this situation, it includs two kinds of possibility,a failure in an electronic circuit and BGA malfunction.

For more detailed reasons and solutions, please have a look at the following article:http://www.ifitjams.com/lappower.htm

If you verify your laptop adapter is dead and you plan to order a new one, I recommend one for you on the basis of your laptop model:

http://www.chargerbuy.com/intocircuit-acer-aspire-5733-ac-adapter-65w-19v.html

Remove the main battery and power up, no change! the power supply should be checked for correct output voltage, if okay! the DC jack in the laptop is a common source of trouble from no power to intermittent operation, at this point I would recommend having the motherboard evaluated.

Hello,You can download your "Acer Laptop PEW71 ASPIRE" manual in Acer website.
Best regards,InJ3CtOr.