Hi! I have a question regarding a Lenovo Yoga S940-14IIL (81Q8). I bought one off eBay with an assumed faulty screen. The device turns on fine and I get a picture via external monitor but the laptop screen (which doesn´t look damaged) stays black.

I measured 8,8V on the lcd connector (with charger connected) and that seems unusual to me. Does this laptop have some sort of unusual design or should it actually be 19V on the lcd, like with most laptops?

As much as I would appreciate a straightforward answer, I would also love to have a schematic for this one because...

yes, it's an IdeaPad not Yoga
need EC bios that on U2502, it's 8Mbit IC from MXIC with marking MX25L8006E

board number:
LS40IC MB
18777-1
448.0HB02.0011

i use RT809F with software version 20240116, i said tried to erase just to make my self clear that the chip is broken or somehow broken that even trying to erase will result same error. i do have another MX25L8006E chip and worked fine using same programmer for the last two years & that software version almost a year and i always desolder the chip and never used a clip to program a bios chip or other rom chip from the begining i purchased RT809F programmer.

the link you mentioned to try the bios file on post #3, i already did and even trying for yoga S940-IWL model, i flashed...

thank's for the info but, i tried almost all the bios image in this forum and all bios image is for U2501 (main bios) based on boardview & schematic i found here [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/109020-lenovo-yoga-s940-14iil-schematic-needed[/url], i flashed & re-flashed the bios i've found before realizing that the EC has it's own chip for it's firmware and all the bios flashed had a same result as the original bios.

or maybe main bios also...

try post #3

[url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/bios-requests-only/101505-need-help-with-s940-14iil-cap-bios-please#post1758400[/url]

according to the Lenovo website the Yoga IdeaPad S940-14IIL has the same bios as the IdeaPad S940-14IIL...https://try post #3<br /> <br /> [ur...t1758400[/url]...

This specification for the Lenovo Yoga S940 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940 Notebook...

This specification for the Lenovo Yoga S940 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940 Notebook...

This specification for the Lenovo Yoga S940 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940 Notebook...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940 Notebook...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940 Notebook...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

This specification for the Lenovo Yoga S940 Ultraportable can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the S940 boardview and S940 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo Yoga S940...

Re: Lenovo Yoga S940-14IIL Schematic Needed

Here is the schematic, if anyone wants to take a look....

Re: Lenovo Yoga S940-14IIL Schematic Needed

Okay, nevermind. I found the schematic.

Still confused though... There should be a "19V_DCBATOUT" signal on the screen connector. But even with the charger plugged in there is only 8,8V.

I could hook up a lab power supply and inject 19V on the screen fuse. Would that be a bad idea?

On the other hand, shouldn´t 8V (battery voltage?) be enough to drive the lcd?

I need the correct bios for the Lenovo Yoga S940-14IWL. Bios to be used via eprom programmer (Xgecu TL866II plus or CH341a) . I extracted the .cap from the new bios, but I don't have a backup of the old bios. All in all, I couldn't solve it. THX in advance



[url]https://***********/file/f*****/AKCN42WW.cap/file[/url]https://I need the correct bios for ...THX in advance

Re: I need the bios for Lenovo Yoga S940-14IWL



you are welcome...

Re: I need the bios for Lenovo Yoga S940-14IWL




It WORKS . Now I "only" have to disassemble the monitor and check the ribbon cable. Yes , the black screen was caused by that and I had mistakenly burned the bios ................

Many thanks


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Re: I need the bios for Lenovo Yoga S940-14IWL



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