Change the bios battery

If the computer cannot keep the Date and Time after you set it and when you boot up next time the Date and Time has changes or not set then the BIOS battery is flat and needs to be replaced.
When you remove the case the BIOS battery most likely will be a coin size 3volt lithium battery, type CR2032.
After replacing the BIOS battery, boot up the computer and go into the BIOS setting and set the Date & Time etc.

Most laptops do not have a BIOS button to reset the BIOS settings.
To reset the BIOS just remove the BIOS battery and wait for approx.20 mins for the battery charge to discharge then replace the battery.
OR
After removing the BIOS battery just short out the battery terminals on the motherboard with a paper clip, the replace the BIOS battery and go into the BIOS setting to change the Date and Time etc.

There isnt a fuse for the LCD screen.
If your laptop appears to boot up and the hard disk LEDflashes, then the problem is probably a back light fault. This can be a faultyinverter or a faulty CCFL lamp. Please click on this link and follow myinstructions to identify the fault and possible fix :- http://www.fixya.com/support/r3598095-faulty_laptop_lcd_screen

Yes you need to install a new BIOS battery. The old BIOS battery is flat and it cannot keep (store) the BIOS setting. Most motherboards use a coin size lithium 3 volt battery type CR2032 button battery.
Check the type of BIOS battery your motherboard uses.
When you replace the BIOS battery, go into the BIOS and set the Date and Time.

you have to change the CMOS battery, this will solve your problem, its just a common problem

when the CMOS battery is replaced the default Bios settings are retained, if u made any custom changes to Bios then u will need to do them again, things like boot menu processor speed settings ect. are you clear on this, 99% of time it changes nothing since most users don't even know what Bios is or how to alter it.

Its possible the bios battery is not holding its charge. Replace the bios battery on you're MB;

Cheers'
Mike

If you change the BIOS date and time and when you boot up next time and the date and time has changed back or is incorrect, then the most likely fault is a flat BIOS battery. Replace the BIOS battery, it maybe a coin type lithium 3volt battery. this is the most common type used in motherboards is a CR2030 lithium battery.

Hi,

what you replace is not the CMOS, but the CMOS battery.

On an ACER from those years the CMOS battery looks like a coin, or a coin wrapped in plastic and connected to the motherboard.

On most models from same series the battery is located on the lower side of the motherboard, like on picture below:



On some model the battery may be located underneath the keyboard.

Here disassembly instructions for a similar model.

1st try a different AC adapter. If no change, flash the BIOS, If still no change, Replace the Battery, if issue still occurs,replace the MB

Here's the manufacturer info link
http://www.intel.com/products/motherboard/DG31PR/configs.htm

BIOS Loses Date and Time (or Changed Settings Not Saved)
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the voltage of the CMOS battery drops below a certain level, the BIOS Setup program settings stored in CMOS RAM (for example, the date and time) might not be accurate. If you find that date and time is incorrect or if you make BIOS setting changes but they are not saved, replace the battery with an equivalent one. Caution Risk of explosion if the battery is replaced with an incorrect type. Batteries should be recycled where possible. Disposal of used batteries must be in accordance with local environmental regulations.
To replace the battery, follow these steps:

1. Turn off all peripheral devices connected to the computer. Disconnect the computer’s power cord from the AC power source (wall outlet or power adapter).
2. Remove the computer cover.
3. Locate the battery on the board.
4. With a medium flat-bladed screwdriver, gently pry the battery free from its connector. Note the orientation of the “+” and “-” on the battery.
5. Install the new battery in the connector, orienting the “+” and “-” correctly.
6. Replace the computer cover.