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]

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]

Thanks , will do .

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

[zen]

Hello again

What number am i looking for ?

Please see attachments .

[zen]

3 amp fuse marked P o/c

[zen]

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]

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

[zen]

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.