• Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
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#1 Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by lomcio 16 May 2025, 19:58
Hej, trafił do mnie Acer Aspire E5-572G z płytą LA-B702P Z5WAW, objawy jakie wykazuje to migotanie ekranu od razu po włączeniu tak jakby się załączało podświetlanie na ułamek sekundy i gasło i tak w kółko, laptop się nie wyłącza a po starcie wentylator wydaje odgłosy jakby laptop normalnie pracował. Jedynie dotychczas sprawdziłem taśmę matrycy, poruszałem itd, żadnych zmian. Podłączenie przed HDMI do monitora też nic nie daje, brak obrazu. Od czego najlepiej teraz zacząć diagnostykę.

Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


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#2 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by lomcio 28 May 2025, 15:04
Jestem po pierwszych pomiarach :
Pl1002 0.49k om 1.34v
Pl302 10.37k om 3.2v
Pl801 0.05k om 1.74v
Pl804 0.05k om 1.74v
Pl502 0.15k om 1.38v
Pl404 5.9k om 5.06v
Pl402 4.8k om 3.39v
Pl602 0.16k om 1.05v
Pl1202 15 om 0.9v
Pl1203 15 om 0.9v

#3 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by matic 29 May 2025, 08:07
Hello!

Measure the voltages to ground on pins 1, 6, 7 of LVDS connector JLVDS1. Check, if the voltages are stable.

#4 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by lomcio 29 May 2025, 15:57
PIN 1 19.4v
PIN 6 0v
PIN 7 0v

#5 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by matic 29 May 2025, 18:04
- Set your multimeter to the diode test mode and measure the voltage drops to ground on pins 6, 7 of LVDS connector JLVDS1 with the positive (red) probe connected to the ground.
- Does the CapsLock LED on the keyboard respond to pressing the CapsLock button? In case there is no CapsLock LED on the keyboard, plug an external USB keyboard to check this.

#6 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by lomcio 30 May 2025, 16:17
Pin 6 0.72v
Pin 7 0.62v

Podłączyłem zewnętrzną klawiaturę. Capslock nie reaguje.

#7 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by matic 5 June 2025, 09:12
Measure the voltages to ground on all coils, when the machine is turned on.

#8 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by lomcio 6 June 2025, 09:13
Wyżej napięcia które podałem są od cewek na włączonym laptopie

Pl1002 0.49k om 1.34v
Pl302 10.37k om 3.2v
Pl801 0.05k om 1.74v
Pl804 0.05k om 1.74v
Pl502 0.15k om 1.38v
Pl404 5.9k om 5.06v
Pl402 4.8k om 3.39v
Pl602 0.16k om 1.05v
Pl1202 15 om 0.9v
Pl1203 15 om 0.9v

#9 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by carrneiro 6 June 2025, 11:28
Laptop się włącza?
Nie wyłącza?
Podajesz zmienne informacje.
Matryca inna podstawiona?
Jaki jest pobór prądu przy odłączonej baterii po starcie urządzenia?
SPI flashowana?

#10 Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


by lomcio 6 June 2025, 12:01
Problem rozwiązany. Reinstall biosu pomógł. Do zamknięcia

Re: Acer Aspire E5-572G LA-B702P Z5WAW. Migotanie ekranu po włączeniu laptopa


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