Dell 5410 not powering on

[motanya]

I thought this is a bios issue but it is not. Other than the main power rail and charging IC, places I ought to think it should have 19v it has 8.6. At the LVDS connector, there is no 19v. If I connect the charger, the power button led comes on for 1minute but the processor is cold and the fan doesn't spin. What might be the issue?

[mon2]

Re: Dell 5410 not powering on

Link the schematic if in the schematic forum.

Measure the voltage to ground of each coil on the board.

Be sure the power adapter is the original. PS_ID voltage is important to measure which is used for the single wire communication to sense a valid adapter.

[motanya]

Re: Dell 5410 not powering on

This board doesn't seem to have a schematic available online yet. Yes I am using the original charger

[mon2]

Re: Dell 5410 not powering on

What are the silkscreen markings on the logic board?

[motanya]

Re: Dell 5410 not powering on

FDZ41 la-j371p
Rev: 1.0(A00)
2020-03-10

[tronix]

Re: Dell 5410 not powering on

I thought this is a bios issue but it is not. Other than the main power rail and charging IC, places I ought to think it should have 19v it has 8.6. At the LVDS connector, there is no 19v. If I connect the charger, the power button led comes on for 1minute but the processor is cold and the fan doesn't spin. What might be the issue?

I have the same problem. Did you find a solution?

[motanya]

Re: Dell 5410 not powering on

No I did not

[Stevedb]

Re: Dell 5410 not powering on

Is this nvdc design? How much is the main power rail?

[Biggs220]

I have the same problem. Did anyone ever figure it out of find a board schematic?

[mon2]

Is this your board? Board is LA-J341P?

[Biggs220]

Re: mon2

My board is LA-J371P. Its the same as the pic of the board motanya posted. The board schematic you posted looks like it but its hard to tell. Would you have a diagram for it?

[ollie2802]

These boards are very complex to fault find. However, you have to establish whether the board works with both barrel and UBS C chargers. I would suggest use the barrel as it's simpler to follow.
Ascertain whether the 19V is present or not. If so, check the usual 3.3v and 5v and take it from there.

[minaedward]

Is this your board? Board is LA-J341P?

Hi
I need this HD picture of this board and if you have a boardview of it
Thanks a lot