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A gaming laptop released by Asus with a CD/DVD drive.

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laptop keyboard lights up and indicates its on but the screen is black

Hi, so my Asus Rog GL55VW-DH71 (dont know if going into specifics was needed but I hope it makes it more clear?) shows a black screen? Whenever its on the charger the keyboard will light up for a second like its turning on but the screen stays black. And whenever its off the charger it won’t turn on at all. Ive taken out the battery and held the power button for 15 seconds, then waited 30 and put it back in and still nothing. Can anyone help me? Thanks!

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Hi,

Try a full power refresh by removing all the power from the laptop i.e. charger, main battery and RTC (Real Time Clock) battery.

The RTC battery is a coin cell battery connected to the motherboard.

So here’s the procedure:

a. Disconnect the charger if connected.

b. Remove the main battery.

c. Disconnect the RTC battery.

Here’s the ifixit Asus Rog GL55VW-DH71 Disassembly guide that shows how to get to the motherboard. You don’t have to remove the motherboard, just disassemble the laptop far enough to access the RTC battery. Maybe only as far as up to Step.4 in the guide. Be gentle and careful when working inside a laptop ;-)

Here’s an image taken from the guide that shows the location of the RTC battery

Block Image

(click on image to enlarge for better viewing)

If you have a DMM (digital multimeter) use its’ Voltmeter function to test the battery’s voltage when it’s disconnected from the motherboard. If it is <2.6V DC replace it. It is a CR1220 battery I think. The model number should be printed on the battery itself. If it is <2.6V DC the BIOS can become corrupted preventing a normal start as the RTC battery maintains the BIOS settings when the laptop is switched off.

d. Press and hold the laptop’s Power button for 30 seconds and then release

e. Reconnect the RTC battery.

g. Reassemble the laptop

h. Reinsert the main battery, connect the charger and then try to turn on the laptop.

If it starts there may be a message regarding the date and time being incorrect. This is normal as the BIOS has been reset. Once it has been corrected, the message won’t appear the next time that the laptop is started.

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Do you think that I can change the CR1220 battery for a CR2025 battery? I think there is enough space and the voltage is 3v both batteries. The only difference is the size.

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@jcabelloyole

If the CR2025 battery has a cable and plug attached (you never said) and that the plug will also insert into the appropriate socket on the board correctly it should work.

The dimensions for the batteries are as follows so you can check if there is enough room to install the battery and make sure that it doesn't interfere with anything once you reassemble the laptop e.g. not too wide or high.

CR1220 = 12mm diameter x 2.0mm height

CR2025 = 20mm diameter x 2.5mm height.

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