Lenovo T470 ,no backlights advice.

[zen]

Hi all

Laptops not really my thing , but here we go .

Can take signal out to a monitor & display present .

Also can see a very faint image on the laptop display .

Customer has already replaced entire display , thinking backlights had failed , but that doesn't seem to be the case .

Hoping for a protection fuse ,but could potentially be the inverter drive circuitry .

Anyone experienced on these ?

[SMDFlea]

Re: Lenovo T470 ,no backlights advice.

Find the motherboard part number and look for the schematic on the forum,look for the fuses at the LVDS connector.Did the full display have another LVDS cable

[zen]

Re: Lenovo T470 ,no backlights advice.

Thanks , will do .

Not sure on the LVDS cable . Need to speak with customer .

[zen]

Re: Lenovo T470 ,no backlights advice.

Hello again

What number am i looking for ?

Please see attachments .

[zen]

Re: Lenovo T470 ,no backlights advice.

3 amp fuse marked P o/c

[zen]

Re: Lenovo T470 ,no backlights advice.

Well fuse replaced , but still no backlights .

Just trying to work out a point i can check supply from , now that board fitted back .

[JaroTech]

Re: Lenovo T470 ,no backlights advice.

Hi, what voltage do you have on pin 23 of your LCD connector?

[zen]

Re: Lenovo T470 ,no backlights advice.

Hi , will check , but looks like i'm now having different issue .

Seems to be cycling , as the fan start / stops .

Not sure what's going on with this unit.