Acer Nitro 5 Dead

[jasonr2000]

hi guys I have the above laptop

Acer Nitro 5 AN515-45

its dead as a dodo.


im not sure where to begin checking for shorts.


can anyone help ??


many thanks

Jason

[Roti]

Re: Acer Nitro 5 Dead

Measure the voltages and resistances from all coils. Is the motherboard LA-H501P? How much current does the motherboard take when plugged in?

[Th3_uN1Qu3]

Re: Acer Nitro 5 Dead

Check for 3.3v on battery connector first, with adapter plugged in. That way we can get an idea where to start measuring.

[mcplslg123]

Re: Acer Nitro 5 Dead

Does 19V crosses after first dc-in mosfet?

[jasonr2000]

Re: Acer Nitro 5 Dead

Measure the voltages and resistances from all coils. Is the motherboard LA-H501P? How much current does the motherboard take when plugged in?

yes its the LA-H501P motherboard.


and ok ill check for that thanks

Check for 3.3v on battery connector first, with adapter plugged in. That way we can get an idea where to start measuring.

thanks ill check for that also today

[jasonr2000]

Re: Acer Nitro 5 Dead

Measure the voltages and resistances from all coils. Is the motherboard LA-H501P? How much current does the motherboard take when plugged in?

there are the readings for the resistance


hi thanks for the reply I have my meter set to 2000 ohms

and get the following readings

PL301 34 ohms

PL501 my meter shows it counting up then 1 (I think means out of range)

PLB1 my meter shows it counting up then 1 (I think means out of range)

PL1101 30 ohms

PCV36 my meter shows it counting up then 1 (I think means out of range)

PLW1 144 ohms

PLV2 26 ohms

PLV3 24 ohms

PCV139 33 ohms

PLH1 52 ohms

PLA1 35 ohms

PLZ4 34 ohms

PLZ3 32 ohms

PLZ2 33 ohms

PLZ1 33 ohms

PLG1 37 ohms

PCZ47 my meter shows it counting up then 1 (I think means out of range)

PLM1 311 ohms

UV49 measures 440 ohms pins 5 6

UV49 measures pin 1 no reading pin 2 1356 ohms

UH2 measures pin 1 no reading pin 2 646 ohms

UH2 measurers pin 5 27 ohms pin 6 571 ohms

all the reaadings was done with my meter set to 2000 ohms

[jasonr2000]

Re: Acer Nitro 5 Dead

Check for 3.3v on battery connector first, with adapter plugged in. That way we can get an idea where to start measuring.

im getting the following on the battery connector 0.27v

Does 19V crosses after first dc-in mosfet?

yes its passing the first dc-in mosfet.

[mcplslg123]

Re: Acer Nitro 5 Dead

Locate the 3V PWM and check for +3V LDO present or not

[jasonr2000]

Re: Acer Nitro 5 Dead

+3V ALW isn't there.

[mcplslg123]

Re: Acer Nitro 5 Dead

+3V ALW isn't there.

I didnt ask for 3V ALW. You need to look for 3V LDO(+3V LP).

[jasonr2000]

Re: Acer Nitro 5 Dead

I didnt ask for 3V ALW. You need to look for 3V LDO(+3V LP).

hi again +3V LP isn't there I don't have a 3V LDO ??

[mon2]

Re: Acer Nitro 5 Dead

The 3v3 LDO is often a local rail on the same controller IC. Being a ldo, usually the current support is low to power a small circuit.

If this LDO rail is not active, check the enable pins for this controller and their voltage to ground. Share the part markings of this regulator ic so we can check the datasheet. Also check the resistance to ground of the non-working voltage rail(s).

[jasonr2000]

Re: Acer Nitro 5 Dead

I have 4.5v on ENLDO 3V5V is that the correct rail ??

[jasonr2000]

Re: Acer Nitro 5 Dead

The 3v3 LDO is often a local rail on the same controller IC. Being a ldo, usually the current support is low to power a small circuit.

If this LDO rail is not active, check the enable pins for this controller and their voltage to ground. Share the part markings of this regulator ic so we can check the datasheet. Also check the resistance to ground of the non-working voltage rail(s).

ok I've found 3v3 LDO and its showing nothing.

in ohms mode it says 530 ohms

I can't read the chip sadly its soo small.

[mon2]

Re: Acer Nitro 5 Dead

Post a picture of the LDO. I think I have the schematic of this unit in my paid sub.

[Roti]

Re: Acer Nitro 5 Dead

Measure the voltage on pin: 2, 9, 11, 12, 17 and 20 PU301. With the motherboard off, measure the resistance to ground at n.8 UH2

[mcplslg123]

Re: Acer Nitro 5 Dead

If 3V LDO rail resistance to GND is indeed 530 Ohms, then its shorted. the resistance here should be in Kohms. Very likely a shorted EC.

[jasonr2000]

Re: Acer Nitro 5 Dead

Post a picture of the LDO. I think I have the schematic of this unit in my paid sub.

sorry for the slow reply guys ive had a busy few days.


I believe this is the LDO

[jasonr2000]

Re: Acer Nitro 5 Dead

Measure the voltage on pin: 2, 9, 11, 12, 17 and 20 PU301. With the motherboard off, measure the resistance to ground at n.8 UH2

pin 8 0n UH2 is 0 ohms

pin 2 = 19V
pin 9 = 0v
pin 11 = 4.06v
pin 12 = 0v
pin 17 = 0v
pin 20 = 0v

[mcplslg123]

Re: Acer Nitro 5 Dead

You can look in schematic or datasheet for +3V LP pin of PWM. Its been days and you still cant confirm whether its present or not and its resistance to GND. All suggestions have been given.Where are your follow ups?