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The VivoBook E203MA-TBCL432B is a laptop manufactured by Asus. It has an 11.6" screen with an Intel Celeron processor and 32 GB of eMMC storage.

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Locked bios, took apart to find CMOS. Display now D/C. Tips? $$?

I accidentally locked myself out with a Bios password. Dissassembled carefullybhopong to find a CMOS battery to reset but didn’t. Now, the screen doesn’t function as something was bumped (but keyboard works, all ports work- external display is fine etc.)


Any tips on fixing this? How much would it cost if I’m lazy? Im sure a lead to the display is just astray. No trauma.

Update (10/15/2020)

Being $200 when I bought it, I'm not looking to spend $100 to repair something simple :(

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Thank you guys SO much. I’m an idiot. My last self repair was such a breeze.

Now I just gotta find out if there is a cmos battery to reset the bios.. I too on it about entirely apart afaik…. If there’s no cmos battery can you even reset a locked bios password? Having trouble finding This out

but I can’t thank you enough for even providing me all this info! You really are awesome.

right to repair ftw

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Hi,

Try shining a torch at an angle close to the laptop screen and check if there are any images to be seen when the laptop is on.

They will be very faint if they are there so trying this in a darkened room may help to see them. Don’t forget that you may have to toggle the display from external back to “laptop only“or “both” using the keyboard. (Fn + F8) Also Fn +F7 turns the display on and off so try that as well

If there are images seen when using a torch, then there is a backlight problem.

Did you disconnect the battery cable from the motherboard when the laptop was open and you were looking for the CMOS battery? If not then perhaps you may have accidentally touched something that you shouldn’t have touched. There is always power available at some points on a laptop motherboard when the laptop is turned off. The power button is not a power isolating button. It merely signals the BIOS to turn the laptop on and off etc. Think of the laptop as being in an extremely low power state rather than being totally switched off.

What is the motherboard’s “board number"? The board number is printed on the motherboard itself. Knowing the board number may hopefully make it easier to find the schematics for the motherboard which will help to find the components on the motherboard that supply the power for the display backlights, so that they can be checked. Search online for (insert motherboard board number) schematics

If there are no images to be seen on the laptop screen when using a torch then open the laptop and disconnect the battery cable from the motherboard and then check that the video cable is securely connected to the motherboard

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I really think it’s just the missing but shown. If I remember corrrecrly, it bunked off and I was planning to solder it back on but my room mate likes to man handle stuff and then gaslight me. I recall having a sticky note at where I thought was busted. A post note where i planned to Resolder

coukd be totally wrong.

rhebscreen is not on at all, it’s not the back light.

and I still need to bios reset on top of this.

toud think I’d found the lead to that goes to where that vacant spot is… I can’t.

mobo says e203ma main board rev 2.0z

cheap laptop but im beyond broke,, it means a lot to me

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Battery cable was never plugged i during this dissection. Never found the cmos and I don’t believe this model even has one...

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@Joe Thomas

What is missing but shown???

What needs to be resoldered?

Your response is not very clear

If it is the video cable, it plugs into the board it is not soldered onto the board. See the ifixit Asus VivoBook E203MA-TBCL432B Display Assembly Replacement guide for how the cable is connected.

Also did you remove the motherboard and check on the underside for the CMOS battery? I don't know if there is one there or not but I've come across this on other laptops and it's a real pain as you have to nearly totally disassemble it to get to the battery.

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