Lenovo E520 Default Screen PN and Bios

[mpikou]

Does anyone knows the default screen part number for Lenovo E520 ?

Also, might have firmware for that screen ?

I have a Lenovo E520, and a tech has changed the screen. I have tried different screens, i can see post screen with backlight only with a M101NWT2 screen - will all others i get only backlight without anything more.

[caspian]

Re: Lenovo E520 Default Screen PN and Bios

it is LTN156AT24.

[mpikou]

Re: Lenovo E520 Default Screen PN and Bios

it is LTN156AT24.

Perfect. Thank you very much for that.

So, its normal that B156XW02 and LP156AWH2 is not compatible ?

Might anyone has LTN156AT24 firmware ?

[caspian]

Re: Lenovo E520 Default Screen PN and Bios

yes, it is normal. many screens of the same size are not compatible to each others. that is why I hate screen replacement.
how many other 15.6" screens have you tested on this laptop so far?

[tomodachi]

Re: Lenovo E520 Default Screen PN and Bios

Sounds like there is a communication problem between your board and display, like eDP circuit is disabled someway, that's why you getting that error, M101NWT2 screen has resolution of 1024x600 which supported by post screen only, not the OS that's why you see post screen only.
E520 originally supports resolution of 1366x768 15.6 led screen. whenever you replace a screen, to let your motherboard recognise the display you must make sure your screen's eprom talks to motherboard first, so your motherboard can know what resolution to go on with in order to keep display going.

[mpikou]

Re: Lenovo E520 Default Screen PN and Bios

yes, it is normal. many screens of the same size are not compatible to each others. that is why I hate screen replacement.
how many other 15.6" screens have you tested on this laptop so far?

I have tested 5-6 different P/N i got in stock.

[mpikou]

Re: Lenovo E520 Default Screen PN and Bios

Sounds like there is a communication problem between your board and display, like eDP circuit is disabled someway, that's why you getting that error, M101NWT2 screen has resolution of 1024x600 which supported by post screen only, not the OS that's why you see post screen only.
E520 originally supports resolution of 1366x768 15.6 led screen. whenever you replace a screen, to let your motherboard recognise the display you must make sure your screen's eprom talks to motherboard first, so your motherboard can know what resolution to go on with in order to keep display going.

I havent tested further than post screen.

How i can make sure that motherboard talks with screen ?

I have a screen programmer, tested to a 15.6" screen some firmwares of AUO, LG and Philips screens without result.

[tomodachi]

Re: Lenovo E520 Default Screen PN and Bios

I havent tested further than post screen.

How i can make sure that motherboard talks with screen ?

I have a screen programmer, tested to a 15.6" screen some firmwares of AUO, LG and Philips screens without result.

motherboard code pls ? need to see schematics

[mpikou]

Re: Lenovo E520 Default Screen PN and Bios

motherboard code pls ? need to see schematics

Code is: 04w0720

If you need full pictures inform me.

Thanks