• Acer Aspire 5740g płyta jv50-cp MB nie włącza się

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#1 Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by soniqgsm 24 March 2025, 13:47
Witam, laptop z rodziny do tej pory działał dobrze i nagle przestał się włączać ani nie ładuje, żadna dioda się nie świeci. Napięcie 19v jest obecne, obok przetwornicy 5v jest 3,3v też. Na włączniku 3,3v też obecne po wciśnięciu schodzi do 0v. Niestety nie mam programatora do biosów więc nie mam jak go zaprogramować od nowa. Czy coś oprócz zaprogramowania biosu mogę jeszcze sprawdzić na płycie żeby się upewnić że jest ok ? Nie jestem jakimś specem a raczej hobbystą więc proszę o radę co ewentualnie zmierzyć/sprawdzić :)

Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by Google Adsense [BOT] 24 March 2025, 13:47

#3 Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by soniqgsm 25 March 2025, 18:06
L34 - 4 kOhm
L24 - 23 ohm
L15 - 90 ohm
L11 - 90 ohm
L16 - 25 ohm
L10 - 525 kOhm
L25 - 29 ohm
L29 - 39 ohm
L33 - 4 mOhm

#5 Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by soniqgsm 27 March 2025, 10:37
With the power supply connected, only the coil near the L10 battery has 1.75V, the rest is 0V.

#7 Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by soniqgsm 27 March 2025, 17:21
U72
1 - 0,4mV
3 - 1,98v
6 - 0,7mV
8- 3,27v
9 - 4,48v
13 - 5,53v
16 - 19,46v
17- 4,94v
18 - 0v
22 - 4,48v
23 - 0,8mV

#8 Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by Machine 28 March 2025, 11:10
Measurements at power on.
Measure the voltages on pins 15, 19, 20, 21, 44, 64, 93, 105, 112 of KBC.
Measure the voltages on pins 95, 117 of the KBC in the following cases:
at power off
with power on pressed
at power on.

#9 Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by soniqgsm 28 March 2025, 14:24
KBC power on:
15 - 0v
19- 3,27v
20 - 0v
21 - 0v
44 - 1,81v
64 - 0v
93 - 0v
105 - 0v
112 - 0v

power off:
95 - 1mV
117 - 0v

with power on presed :
95 - 3,27 to press power on 0v
117 - 0v

at power on:
95 - 3,27v
117 - 0v

#11 Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by soniqgsm 6 April 2025, 10:40
reprogramming u16 did nothing but after reprogramming u16 and u56 the laptop works. Thanks :)

Re: Acer Aspire 5740g płyta jv50-cp MB nie włącza się


by Google Adsense [BOT] 6 April 2025, 10:40

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