• HP DV7-2180ED - włącza się na 1 sekundę i gaśnie

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#1 HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by arjuredi 8 July 2019, 15:38
Witam.
Oznaczenia płyty - DAUT3DMB8D0 rev. D. Po sekundzie od włączenia, płyta wyłącza się. Poniżej pomiary rezystancji i napięć na poszczególnych cewkach (pomiary z procesorem i ramem):
PL9 - 44kΩ; 3,39V
PL8 - 37kΩ; 5,14V
PL7 - 3MΩ; 0,63V
PL11 - 1,27kΩ; 1,82V
PL12 - 14,5Ω; 1,07V
PL6 - 13,5Ω; 0,99V
PL5 - 13,5Ω; 0,99V
PL10 - 3Ω; 1,1V
Ram i procesor wymieniałem. Proszę o dalsze wskazówki.

Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by Google Adsense [BOT] 8 July 2019, 15:38

#2 Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by matic 8 July 2019, 18:21
Hello!

Measure the power consumption (in mA) of the board, when the laptop is turned on without battery connected.

#3 Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by arjuredi 9 July 2019, 12:58
Power consumption is 1,19A, while the motherboard is working for 1 second.

#4 Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by matic 9 July 2019, 13:08
Try to turn on the board without RAM memory. Are there any changes in operation in this case?
Also measure the power consumption in this case.

#5 Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by arjuredi 9 July 2019, 14:00
Without ram memory is the same. Power consumption is 1,15A.

#6 Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie  [SOLVED]


by matic 9 July 2019, 14:27
Try to reflash the BIOS chip. Don't forget to save the old dump.

If it does not change anything, reflow the GPU.

#7 Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by arjuredi 11 July 2019, 14:12
I put the vga chip on new solder balls and the motherboard is working. I bought a new chip. Thanks for help.

Re: HP DV7-2180ED - włącza się na 1 sekundę i gaśnie


by Google Adsense [BOT] 11 July 2019, 14:12

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