Aspire 5750G, can't get it

[hansie55]

Hey folks,
Another one which drives me crazy/ (I know part is though my lack of knowledge)
Acer Aspire 5750G power on, powerled at switch and in front are on for about 15 seconds and switches off. Battery charge light stays on.
Fan comes up for 3 seconds at normal speed and slowes down.
All the time no immage on lcd and hdmi.
Switched processor, no change
Tried to do bios recovery flash, but no luck however I do it.
When I follow the instructions from Biosmods, it keep switching of after 15 sec.
Following the Acer service manual instructions (Fn+Esc) the system comes on like before, but now with the fan at full speed and it does not switch off.
In all cases no further activity and the usb stick is not accest.
I tried both methodes many-many times with different files, but no luck.

Can anybody shed some light on this topic please?

[dj_ricoh]

Re: Aspire 5750G, can't get it

do a reflow
aaaaaaand beware that acer its well known to not post if bios battery low (dead)

[hansie55]

Re: Aspire 5750G, can't get it

Thx Ricoh, which parts I should concentrade on for the reflow?


Bios battery 2,80V exchanged for 3,15V, no change

[dj_ricoh]

Re: Aspire 5750G, can't get it

Make a photo with top view to see the board

[dellxps15]

Re: Aspire 5750G, can't get it

i have same notebook here
edit: i have had it here.

problem was pc power on, but black screen. i reballed intel chip (yes 0.3 balls that i hate the most) and pc was back to life.

ps: intel chipset tend to fail when they get some hurt. generally reflow didnt give success. a proper reball is needed. and u can use same chip. no need to buy a new one if it didnt pop corn

[hansie55]

Re: Aspire 5750G, can't get it

thx dellxps15. regretfully I can not reball. I have Parkinson and smd soldering is very haevy for me, let alone reballing. I bet most of the balls end up somewere else than the chip.


Ricoh: I will disassemble laptop and make picture.

[hansie55]

Re: Aspire 5750G, can't get it

I cooked the intel chip, but no picture.
Something changed when I try to recover bios.
When I press windowkey+B, connnect adapter, powerswitch led and powerled go on for 2 seconds and than and than out off. Direct after 2 seconds the powerled goes on and the hdd led flashes 1 time (no hdd), All this time I keep the keys pressed. The usb stick does not react. After 10 seconds the systems switch off,
This is more than I had before. I tried with Fn+B, same result.
I tried with Fn+esc, but more than a extra blink from the hdd led I don't get.
Sometimes the orange light from the powerled lights up before the system restarts when I have winkey+B pressed,

Can somebody tell me the right procedure to flash/recover the bios of this laptop and which files to use. Google give different methodes but I have not found one that works.

[hansie55]

Re: Aspire 5750G, can't get it

Make a photo with top view to see the board

Herewith

[hansie55]

Re: Aspire 5750G, can't get it

Solved
Bought a new motherboard on Ebay.