20 Most Recent Acer ASPIRE 4720Z-2A0508MI LAPTOP LCD SCREEN 14.1" WXGA CCFL SINGLE (SUBSTITUTE REPLACEMENT LCD SCRE... Questions & Answers

If nothing pop up on Task bar even after pressing the WIFI button so might be the WIFI drivers are missing... so install WIFI drivers and check it...

Try connecting it to a TV or monitor, if you get a picture on them the fault lies with the screen itself, if you still don't get any picture it may be a graphics/motherboard issue.

The only way to reset a bios password is to remove the CMOS battery. This is a watch type battery, normally model 2032. Not sure where it is located, but is normally underneath the keyboard, connected directly to the motherboard. Can be a pain to get to.

Try another Core/Charger with the EXACT same power specs.

Go to the link below and download Ophcrack and burn the iso to a cd. Boot from the CD and let it do it's magic. You'll have the password shortly:http://ophcrack.sourceforge.net/download.php

Acer Aspire 4720 has a wireless button to enable/ disable the wireless communication on your laptop.

You also refer to Acer 4750Z Manual for further information, if required.

Hope it helps! Good Luck!
CreativeTECH

try this way please.
1 Ensure all Data is backed up, all data will be deleted. 2 Please also ensure that all USB storage devices are removed before starting the recovery process 3 Restart machine 4 When your unit switches back on, wait for the ACER screen then hold down alt & tap f10 repeatedly.. 5 Please wait a moment until prompted, -How would you like to restore?- 6 Please select -Restore system to factory default- 7 Enter your defined password or enter six zeros '000000' 8 Click ok 9 Please wait until process completed, this will take 45min - 1hour
ALL personal information on the C: Drive I.E photos, programs, music and documents will be wiped when the above steps are taken. Files located on the D: Drive will be safe from the procedure.

I use a program called "locksmith" which is included on a "commander disk" that I have.
you can check at :
http://www.bootcd.us/ERD_Commander_2003.php I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Perfectly normal. It depends on the internal timing of the GPU and the OS version.

it needs service, and service manuals are hard to find on anything by the likes of ACER. this projector worked for 12 long years, did you own it 12 or bought a bad projector, no history told as I can buy dead projectors all day long. and hard nut problems even hacking done. Acer X1110 data projector Standard throw projector.. did you know most projectors have serious grade protective devices inside??? (tamper and overheating are 2) did you read owners manual page 32 yet, errors. LED codes.? there are 4 LED, and all 4 matter, projector turned (ON) (not one =1) also in pairs glowing and also if blinking or not, so read page 32 it tells all that. my guess is overheat failures, even cold, due fan slow or packed in lint after 12 years of use and no service done,. https://manualzz.com/doc/49497108/acer-x1110-user-manual some have dust filtler a shop first cleans is out first, and check fan RPM with and LED tachometer. this is all SOP.

English only please https://www.google.com/search?q=How+to+turn+on+WiFi+on+Acer+4720Z ..

That button can be set using the utility on your programs list

It maybe that you accidentally turned it off or set it to do some other task.

Start there first before re-installing the program that sets it.
That is on one of the cds that should have come with it and can be installed by itself.

I would try starting up and go straight into the BIOS. Set up your system and reboot.

This computer does not have Bluetooth capabilities and you can't make it, by adding a Bluetooth Driver. It would need a Bluetooth transmitter and receiver HARDWARE built into the computer at the time of manufacture.. https://icecat.biz/en/p/acer/lx.akg0x.146/aspire-notebooks-aspire+7520-6a2g16mi-1376542.html and this site actually says it. https://www.bhphotovideo.com/c/product/538918-REG/Acer_LX_AN20X_017_Aspire_7520_5757_Notebook_Computer.html/specs Wireless Wi-Fi: 802.11b/g Bluetooth: None ..

bad battery

test battery

If Laptop is ok and screen is ok then I suggest check the ribbon cable connectors. Are all wires ok ? For information, CCFL Service manual is here https://clubelectronicos.com/wp-content/uploads/2020/11/lg_inverter_t-con_board_repair.pdf and Acer Aspire 8930G Service manual is here Acer Aspire 8930G Service Manual (Page 107 of 119) ' ManualsLib