Hello,
i have this sony bravia kdl-43w755c which boot loops. After sony logo, it shows the android animation loading then it restarts…
from what i read online it looks to be an emmc issue…
i’m not familiar with this kind of tv repairs… i’m repairing laptops and gpu’s…
i took out the board and say an samsung 16gb emmc
i don’t have an exact replacement, but i have a few 32 and 64gb emms’s from laptops…
i could try to put one instead of the 16gb one, but will it work?
where do i get the software from?
any help will be much appreciated!...
justin35
Senior Member
Last Activity: 03-15-2025, 05:25 AM
Joined: 01-20-2019
Location: Phen
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bios request - medion erazer x15809
i need original bin / rom file for medion x15809 MSN: 30027171 (it 9750 + rtx2070)
x15908-MD 61598
if possible i need ec bin file also...
this laptop came with different bios and it's acting wired... (mechrevo)
thank you! -
Re: Lenovo legion y540 15irh
Thanks for your advice! But, vram is ok as long as i took off the vram bank that was pointed as faulty. It turned out to be a not connected pad underneath gpu… i am sure i didn’t screw up anything when i reball it. It might be a broken trace in gpu pcb (not the first one i encounter)
From my experience, samsung memory fails quite rarely -
Re: Lenovo legion y540 15irh
Here's what i did so far…
Reball pch
Reball gpu
Reball vram (and change 3 of the banks as i didn't like the way that measure)
Now i have this and i bet is a dead gpu… after all this work, i think i'll get a replcement gpu…because i spent too much time and i need it to work...Leave a comment:
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Re: Lenovo legion y540 15irh
Got some new updates:
Board charged the battery and the orange light is off now.
Also the blinking white led it a solid white. It means the flashing power led / button is indicating the battery is not full…
I think at this point the board is working somehow as i can power on/off
It’s not displaying anything on internal or external monitor… i don’t know the cause…
After around 30 seconds it turns itself off. Might be the pc is displaying some warning and if nothing is happening will turn itself...Leave a comment:
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Re: Lenovo legion y540 15irh
Recently lenovo started to use some sort of glue that acts like an under fill around the bga chip corners…
You cannot reflow the larger bga chips in this case. It will result in a partially desoldered chip, or worse bridged balls underneath.
In my case someone tried this reflow method and resulted in a big short underneath pch (1.05, 3.3 and 1.8v)
I don't know exactly what is the resistance on 1.05v now, but the lowest resistance on pch is around 40ohms and the rest are in hundreds to kohms…Leave a comment:
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Re: Lenovo legion y540 15irh
tried, but without luck...
I have news, laptop is not brain dead. if i press the power button it does the boot sequence.
some fan speed + keyboard baklight
then it restarts and goes to full fan speed
meanwhile i attached an external keyboard and i toggleled capslock and numlock. they work, but after like 20 seconds the laptop goes off
i connected internal screen (no image)
i connected external hdmi (no image)
i plugged in battery and it shows orange light and i think it's charging it...
it even starts...Leave a comment:
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Re: Lenovo legion y540 15irh
Will y740 15irh with 1660 vga bios work on y540 15irh with1660?Leave a comment:
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Re: Lenovo legion y540 15irh
Here’s what i read from the original author:
“Update (06/28/2020)
Well problem is probably solved, partially. I took out recovery modem and for now it runs. No booting problem for now”
I think i need vga bios as i don’t trust what’s inside that chip
Device: laptop
Brand: lenovo
Model: legion y540 15irh
Board number: nm-c221 rev 2.0 (fy5151/516/517/518/523/524/525/526
REQUEST: BIOS + VGA BIOS
it's important to get the vga bios since someone messed up with...Leave a comment:
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Re: Lenovo legion y540 15irh
I’ve seen an yt video with someone fixing this laptop and after replacing sio chip it booted and during boot the power button led was flashing all the time…
It makes me think it’s normal maybe?!? But why no picture on internal or external display?!?
I will assemble the laptop back and see if it charges the battery or somethingLeave a comment:
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Re: Lenovo legion y540 15irh
Insaw that also, but it doesn’t have anu “ modem” or i am no aware of…Leave a comment:
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Lenovo legion y540 15irh
Need help !
Lenovo legion y540 15irh
It frozen and didn’t power on after hard reset.
It has been take to a local shop where they butchered the bios ic and gpu bios ic, and they heated pch (hm370)
Now my turn:
Tried bios with new bios but fund out i had a short on 1.05(pch)
I took out pch and reball it
No more short (pch) and i get cpu vcore and gpu vcore but the button light is flasing constantly…. Sometimes it powers off itself (i guess because of thermal cause as i only hve a small radiator in cpu)
Anyone know what this constant flasing... -
Lenovo legion y740 15irhg / 17irhg
I am struggling to find an sku_id strap on any of these boards… i only have the 15irhg model in hand and i need a 17irhg one. If anyone have one laying around i would really appreciate if can provide some high res pictures around the chipset area(south bridge)
maybe i can locate it visually.
what i know it's a 10k resistor tied either to 3v or gnd. Depends on model…
i tried finding board view but no luck… -
Re: onkyo tx nr515 - dsp replacement....
Hey everybody!!!
I just installed a new dsp chip and i think receiver is back to normal.
I had to buy a different onkyo board with the same dsp chip and harvest it
Now i can access network and it asks for update. It also works on all inputs and outputs. I assume it's fixed!
I have no knowledge about this tx nr515 menu or how to use it for now
I fitted a small radiator on dsp chip, and will attach a fan inside the case to blow air over it.
So, in conclusion, i don't think you need to program...Leave a comment:
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Msi ms-17581 Need schematic/boardview or at least pictures of mb please!
As title says, i need schematics or boardview…
OR
At least a close picture of the components in the below picture… they are missing from my board and i have no clue what they are (diode and double mosfet, p?n?)
Thanks a million!... -
Re: onkyo tx nr515 - dsp replacement....
Thanks for your reply!
I think i found my problem on that forum...
Even from beginning it was something unusual with the rev D chips i received... and now i think they are “fake”
Why i am saying this? The original chip had 3 larger holes on eqch corner and one slightly smaller on the fourth one which also indicates it's orientation... the new one i received doesn't have any....
This indicates they have sanded surfaces and new laser engraved texts... they may also be rev B “refurbished” ...
As one...Leave a comment:
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Re: onkyo tx nr515 - dsp replacement....
Well I bought 3 rev D dsp chips from china... i just placed a new one on onkio tx 8050 and nothing.... still “??????????” On the display
Of course network and usb “now initializ”
Any suggestion?Leave a comment:
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Re: onkyo tx nr515 - dsp replacement....
I know... but if i use rev D I assume i have to reprogram nand 100%?
Am i wrong?Leave a comment:
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Re: onkyo tx nr515 - dsp replacement....
I was thinkng to try with rev B first... maybe i don't need to reprogram nand memory.Leave a comment:
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Re: onkyo tx nr515 - dsp replacement....
I guess i’ll change dsp ic rev B with a rev B and see if it’s working... else i’ll reprogram nand...Last edited by justin35; 11-13-2020, 02:12 PM.Leave a comment:
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