• Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza

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#1 Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by dggn 1 December 2023, 13:49
Jak w temacie laptop po włączeniu nie daje obrazu i po ok. 30 sekundach się wyłącza
Zresetowany CMOS, podmieniony bios ze sprawnego bratniego modelu i to samo. Co mogę sprawdzić

Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by Google Adsense [BOT] 1 December 2023, 13:49

#3 Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by dggn 4 December 2023, 13:54
Napięcia na cewkach
L7201 0.8V
PL4302 0V
PL4401 6.10V
PL4501 5V
PL4502 3.3V
PL4701 0.8V
PL4702 0.8V
PL5001 1.08V
PL5101 1.2V
PL5201 1.08V

Rezystancja na cewkach
L7201 0.82kΩ
PL4302 4.3Ω
PL4401 ok. 15MΩ
PL4501 0.89kΩ
PL4502 2.8kΩ
PL4701 3.2Ω
PL4702 3.2Ω
PL5001 13Ω
PL5101 124.6Ω
PL5201 41.9Ω

#4 Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by dggn 15 December 2023, 12:10
pomógłby ktoś w identyfikacji problemu?

#6 Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by dggn 18 December 2023, 15:42
Jak włączony to 3.3V a jak się już wyłączy to 0V

#8 Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by dggn 20 December 2023, 14:24
voltages on LCD1 LCD Connector
n.17 0V
n.18 0V
n.21 0.8V
n.22 0V
n.24 0V

#10 Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by dggn 20 December 2023, 16:49
jak sprawdzić żeby się upewnić? Próba zwarciowa ?

Re: Lenovo Yoga x390 płyta LBB-1 MB 18729-1 brak obrazu i się wyłącza


by Google Adsense [BOT] 20 December 2023, 16:49
This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).

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