Re: Lenovo S531 - LA-9671P burned KB9012
Yes, there is 3.3v on KB9012, but not 5.10v....where should i have the 5.10v?
I have everywhere 3.3v, also on AVCC (PIN 67) where i should have 1.8v or am I being wrong?
Greets Grishnackh...
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Re: Lenovo S531 - LA-9671P burned KB9012
Does nobody has any information or suggestions about this problem?
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Re: Samsung UE32F6470 only red LED
Hello,
i tried to reflow the CPU, but no improvement. I got a used worked PSU, built it in and the TV is running. So i dont know whats wrong, it must be something wrong with the PSU...some IC or something else. However, i am happy that the TV is running with the used PSU. Thank you all for your help!
Greets, Grishnackh
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Re: Samsung UE32F6470 only red LED
Guys many thanks for your posts, i am really sorry but i am not at home today, so i cant work on the TV. But my Problem is like Moreno83 wrote it on his last post #24
Greets Grishnackh
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Re: Samsung UE32F6470 only red LED
Already done...fifth post..."When i only connect the PSU + Backlight, the Backlight works"
I dont know would i could be, it only could some IC i think....however i will continue the measure tomorrow...
Greets, Grishnackh...
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Re: Samsung UE32F6470 only red LED
Yes, DC Volt...thats right.
I only have the PSU connected to 230V, no mainboard and no backlight.
Greets, Grishnackh...
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Re: Samsung UE32F6470 only red LED
Sorry, it was my mistake...at the moment i have this values
pin 7 & 9 -> 9,3V
Pins 11 & 13 -> 9,3V
Maybe the Voltage is to low for the mainboard, that´s why i didnt start?!
Greeets, Grishnackh
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Re: Samsung UE32F6470 only red LED
Ah ok, sorry...i understand - i think you talk about this...
Greets, Grishnackh...
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Re: Samsung UE32F6470 only red LED
Hello,
here are some values i measured. I found also a Russian Page [URL="http://www.kenotrontv.ru/forum/files/file/3157-bn44-00620a/"]http://www.kenotrontv.ru/forum/files/file/3157-bn44-00620a/[/URL] with some reference values, however these do not fit with my PSU:-(
Greets, GrishnackhRe: Samsung UE32F6470 only red LED
Hello,
here are some values i measured. I found also a Russian Page [URL="http://www.kenotrontv.ru/forum/files/file/3157-bn44-00620a/"]http://www.kenotrontv.ru/forum/files/file/3157-bn44-00620a/[/URL]...
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Re: Lenovo S531 - LA-9671P burned KB9012
I flashed it with a RT809F, which is able to flash the KB9012 over the Keyboard Connector. Only the EC File, its a 128kb Part from the Bios File. I flashed the BIOS IC (Winbond) too, but still not running.
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Lenovo S531 - LA-9671P burned KB9012
Hello Guys,
i got a faulty Lenovo S531 with a burned KB9012. I changed the KB9012, flashed the right Bios/EC File on it but he want turn on. I also changed the DC Board. When i press the power button, the fan starts to spin for 1 sec and then stops, also the keyboard light flashes on but immediately turns off. I couldnt find any schematic for this board. Does anyone have some information where i could begin to solve this problem? Or does somebody know from other Lenovo Boards what it could be? This Board has fixed soldered CPU and RAM, maybe my start problem could be a sign for...
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Re: Samsung UE32F6470 only red LED
Hello,
i have something tested. First, sorry but the red led turns on, flash two times and stay red, flash again, stay red and so on. This happens when PSU + Mainboard + Backlight + T-CON is connected. When i only connect the PSU + Backlight, the Backlight works. If i connect PSU + Mainboard + Backlight (without T-Con) it flash and stay red but the Backlight turns on for less then one second. I checked all the capacitors, but they all have the right values. I didnt check any voltage, where should i begin? Where are PSON and BLon pins...Last edited by Grishnackh; 07-15-2016, 05:51 PM.
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Samsung UE32F6470 only red LED
Hello Guys,
i have a Samsung UE32F6470 which does not turn on, only the red LED burn. It´s a BN44-00620A. I have tried to find some faulty capacitors, but everyone looks "normal". Are there any known components which are responsible for the defect?
Greets, Grishnackh
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Re: Alienware 17 (R5) shorted Mosfet
@koresi Thank you, i removed the PU501 and the short circuit is gone...hope to get soon the new one to test it.
@tata123
Ich kenn die Vorgeschichte leider nicht, ich habe das Alienware defekt gekauft - lt. Verkäufer war das Mainboard defekt bzw. lies sich er sich nicht mehr starten. Als ich es erhalten habe, stellte ich fest, dass das Netzteil nicht geleuchtet hat und auch keine Spannung raus kam. Daraufhin habe ich mir ein neues Netzteil bestellt, den Laptop angeschlossen und bemerkt dass es irgendwo raucht -> es war der...
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Re: Alienware 17 (R5) shorted Mosfet
Thank you, i ordered it on aliexpress and the PU500 too - Do you think changing the PU501 will solve my problem?
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Re: Alienware 17 (R5) shorted Mosfet
@Koresi i think you are right....on PU501 Pin 4 (GND) is connected to PIN 8 (PHASE3) and continue to Drain to Source from PQ503 and PQ504. So i could only be the PU501 or? Could anyone has information where to get this part in europe or a comparable to ISL6208BCRZ-T?
Greets, Grishnackh...
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Re: Alienware 17 (R5) shorted Mosfet
I think its PQ503 and PQ504 - both are shorted at least i have direct connection from Drain to Source. Is this my problem?
Other Mosfets PQ507, PQ508, PQ511 and PQ512 doenst have direct connection from Drain to Source.
Greets, Grishnackh...Last edited by Grishnackh; 07-12-2016, 03:53 PM.
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Re: Alienware 17 (R5) shorted Mosfet
Hello,
thank you all for your help so far....what i found out, is that PL501 seems to be defect or theres something wrong. I removed PL501, PL502 and PL503. Only PL501 (i called it "A") "A" has a connection to ground - that shouldnt be, "B" where connected with "B" from PL502 and PL503. PL502 and PL503 both "A" doesnt have connection to ground. When PL501 was on board, PL502 and PL503 also the little capacitors between PL502 and the CPU Socket were shorted. So i think i should...
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Re: Alienware 17 (R5) shorted Mosfet
pl501 to ground -> 0,1-0,2 Ohm
pl502 to ground -> 0,1-0,2 Ohm
pl502 to ground -> 0,1-0,2 Ohm
pq502 pin4 and gnd -> 22 MOhm
pq502 pins1,2,3 and gnd -> 0,4 Ohm
pq502 pins5,6,7,8 and gnd -> 33 MOhm
pq502 pins1,2,3 and pins5,6,7,8 -> 19 MOhm
Greets, Grishnackh...
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Re: Alienware 17 (R5) shorted Mosfet
Hello,
@polytek - thank you for you help, i measured the ohm - like shown in your picture - to ground, and it´s about 0,2 Ohm. I hope i did it correct, because it has only two pins (see picture). Should i measure the voltage too? I am afraid to burn another mosfet - i already removed the burned PQ502.
Greets, Grishnackh...
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