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Discussion Starter · #1 ·
Asus X555LA Laptop

Battery Only - Press ON button - nothing - not even logo

Then plug in power - up comes the image of the OS loading

Screen works fine while power connected - take out power - screen goes off, but still runs in the background

Thanks
 

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You probably need a new battery.

When you click on the battery icon near the clock does it show the charge on the battery, and that it's charging when the power lead is plugged in ?

What do mean by 'still runs in the background' ?
 

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Discussion Starter · #4 ·
OK, here is what I did this morning

It has been unplugged all night

Didn't plug it in to the mains this morning, so I pressed the ON button. NOTHING comes on the screen.

Went away for 5 minutes

Came back and plugged in the power - up comes the desktop straight away loaded. Battery almost 100%.

Never seen it before. It is though the screen lights up ONLY when power plugged in - Not even the computer logo comes up on battery power when first switched on ?
 

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It's clear that there is a problem when it's on the battery. Does the machine work and show normal drainage when you disconnect the battery? Or does it shut down quickly?

in command prompt (you may need to be in command prompt admin mode for this) type powercfg /batteryreport and press enter. It should make a file. Then go to the location shown and open it. Please copy/paste it here.
 

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Battery report
COMPUTER NAMELAPTOP
SYSTEM PRODUCT NAMEASUSTeK COMPUTER INC. X555LA
BIOSX555LA.312 04/19/2019
OS BUILD19041.1.amd64fre.vb_release.191206-1406
PLATFORM ROLEMobile
CONNECTED STANDBYNot supported
REPORT TIME2021-10-2419:09:03
Installed batteries
Information about each currently installed battery
BATTERY 1
NAMEX555-50
MANUFACTURERASUSTeK
SERIAL NUMBER-
CHEMISTRYLIon
DESIGN CAPACITY37,331 mWh
FULL CHARGE CAPACITY30,559 mWh
CYCLE COUNT32
Recent usage
Power states over the last 3 days

 

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Discussion Starter · #7 ·
It's clear that there is a problem when it's on the battery. Does the machine work and show normal drainage when you disconnect the battery? Or does it shut down quickly?

in command prompt (you may need to be in command prompt admin mode for this) type powercfg /batteryreport and press enter. It should make a file. Then go to the location shown and open it. Please copy/paste it here.
Yep battery remains good after power removed when ON

Power plugged back in to reveal 90% 30 mins later while running on battery power for the 30 mins while screen turns itself off when power removed
 

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Check your power settings, make sure it's not set to turn the screen off or enter sleep soon on battery power.
 

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Discussion Starter · #9 ·
Power settings are ok

HOWEVER, as mentioned - when starting in battery power, when ON button pressed - not even the ASUS LOGO appears on the screen, even though windows is loading in the background
 

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Discussion Starter · #12 ·
Ah

Just discovered that when you shine a light on the screen while turning it on with battery only, you can make out the writing

Plug power in and the screen lights up

Is that a faulty screen ???
 

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You are looking at either the lcd or the board not supplying the power to the LCD... or a simple case of the settings set to low. Can you go into the BIOS and look for anything that says LCD brightness on battery?

If that is a fail, then search for and open the Intel HD Graphics Control Panel. If you have that try Power-->On Battery-->Disable Power Saving Technology. Move the slider to Maximum Quality
 

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Could be a fault on the motherboard not allowing the battery to power the screen's backlight, since you do get a display with charger connected I think the screen itself is ok.
 

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Discussion Starter · #15 ·
You are looking at either the lcd or the board not supplying the power to the LCD... or a simple case of the settings set to low. Can you go into the BIOS and look for anything that says LCD brightness on battery?

If that is a fail, then search for and open the Intel HD Graphics Control Panel. If you have that try Power-->On Battery-->Disable Power Saving Technology. Move the slider to Maximum Quality
I remember looking in the bios for something similar but it was rather basic. Will have another look.

Ref Intel Graphics - wouldn't that come into play only when windows was loaded as not even the Asus logo appears when starting....
 

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Discussion Starter · #17 ·
Attempted to boot from linux dvd in Recovery section in settings - gave me the choice to boot from DVD....

Went through the motions, but never completed - then booted to windows

Tried to repeat the procedure and could not find "boot from DVD" anywhere after that .... ????

Plugged in external monitor to VGA out - picture OK on monitor when power removed from laptop....

Does that prove anything ?!
 

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Nice piece of troubleshooting swapping screens. :up:

I would put the original screen back to make sure it wasn't just a poor connection.

If it's still not lighting up with battery power you may be able to find a cheap used screen on Ebay.
 
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