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T420 no backlight
T420 no backlight
A friend of mine bought T420 with broken screen. After installing new screen it turned out there is no backlight.
Is it faulty inverter? fuse on motherboard? or lcd cable? how to find out?
Is it faulty inverter? fuse on motherboard? or lcd cable? how to find out?
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Re: T420 no backlight
Check the fuses F3 (3A) and F19 (0.5A) near the LCD-connector on the mobo.
Lovely day for a Guinness! (The Real Black Stuff)
Lenovo: X240, X250, T440p, T480, M900 Tiny.
PS: the old Boardroom website is still available on the Wayback Machine.
Lenovo: X240, X250, T440p, T480, M900 Tiny.
PS: the old Boardroom website is still available on the Wayback Machine.
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- Admin Emeritus
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Re: T420 no backlight
Looks bad indeed, those plugs usually have 30 or 40 contacts, yours looks like 35 or 37?
Also, HD and HD+ screens use different LCD-cables, be warned!
HD 04W1617
HD+ 04W1618
Also, HD and HD+ screens use different LCD-cables, be warned!
HD 04W1617
HD+ 04W1618
Re: T420 no backlight
yes I know about the cables, it's HD 04W1617
Re: T420 no backlight
it was F7 (on the other side).RealBlackStuff wrote: ↑Fri Sep 01, 2017 8:49 amCheck the fuses F3 (3A) and F19 (0.5A) near the LCD-connector on the mobo.
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