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January 13th, 2026 13:49
Dell internal display doesn't work
Dell Inspiron laptop – internal display does not turn on.
Screen works only in LCD colour test mode.
Backlight is working.
LCD cable replaced.
No beep sound on boot.
And sometimes work in past.
External monitor doesn't work due to not working of internal screen .Any guidance appreciated.
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ejn63
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30.2K Posts
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January 13th, 2026 16:15
Prime one would be no display at all.
ejn63
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30.2K Posts
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January 13th, 2026 14:25
If the screen does show a self-test OK, but there's no image internally or externally, the mainboard needs to be replaced. If you need a part reference, post the full system model number - Inspiron 3593, 3501, etc.
delluser078
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January 13th, 2026 15:09
@ejn63 but laptop starts but display is off, no black screen, and model is pp39l and 1558
, tell me the problem which is occurred
delluser078
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January 13th, 2026 15:10
I am facing an issue with my Dell Inspiron 1558
- Internal screen does not turn on during normal boot.
- Colour test / backlight works fine.
- LCD cable, port, and LVDS signal line are working correctly.
- 1 RAM stick may be faulty; HDD is old.
- Beep codes are not coming during boot.
- External monitor works fine (optional if you tested).
What could be the reason for the internal screen not showing display? Is this a motherboard / EC issue? Please advise possible fixes or repair options.
Thank you.
(edited)
ejn63
10 Elder
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30.2K Posts
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January 13th, 2026 15:11
No one can confirm the exact fault without access to the system, but a failed GPU is top of the list. Bear in mind the system is worth about $20 at most -- it can be replaced for far less than a repair will cost.
https://www.ebay.com/p/131629117
(edited)
delluser078
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January 13th, 2026 16:07
@ejn63 what are the symptoms of failed gpu?