Re: macbook 820-00165 ppbus short
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macbook 820-00165 ppbus short
hello
i've just got a macbook air 820-00165 motherboard.
ppbus_g3h is short du to c7313, a tantalum 62uf 11v capacitor.
my problem is that i haven't got any capacitor like this.
can i leave c7313 empty as there is many many capacitor on g3hot line ?
thank you
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Thinkpad t470 short on vcc3m , can't find culprit
hello,
i have a lenovo thinkpad t470 to fix
sudenly no power no start
no liquid damage
i find a short on vcc3m line, desolder the power coil, and the short is not on the side of TPS51285B
when i inject 3v 2amp with my power supply i have a consumption of 0.9 amp (either i up intensity over 2amp) and nothing is hot
can you help me guys ?
thank you...
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M2npv-vm motherboard , oxydation near ITE, missing component
hello
i have a asus M2npv-vm motherboard that start only fan and light
after inspection, ite is oxydize.
i remove oxydation and rework solder pads, but a three legs component is destroy, it is named 026H and it is located at the upper right of the chip near 64th leg.
i found that the one leg side is connected to pin 68 of ITE.
can anybody have schematics, boardview or know what this component is ?
thank you
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ideacentre : mb la-d831p dead cpu mosfet
hello,
i need some advise before plug this crapy thing on AC
it is a all in one lenovo laptop, ideacentre with a la-d831p motherboard.
this one come with no power , no led, dead state.
open it and see that 12V power rail that goes to CPU power supply was totaly fried, and the two coils on it was blown. so remove this coils, but some solder mask on the rail and replace for test by 2 0ohm resistor (can't find the reference of PL smd)
with this problem, one mosfet going to cpu was shorted : sm4377 on PQ1001 location. without...
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Re: SLES 2012SVS40 mistake, need help
hello, sorry but i misread the fix.
in fact there is 4 bank of leds (on 6 pin strip) drived bye 3 wires by strip
i didn't do like your website but i do this :
left strip :
pin 1 and 6 (1 is upper one) together, and wired to positive wire from board
pin 5 and ten together and wired to negative from board
jump pin 3 to 4 and 7 to 8.
on right one exactly the same but pin 1 is lower one.
now backlight works fine.
BUT : i have new issue on this one, half screen only. defective...
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Re: SLES 2012SVS40 mistake, need help
hello
i've got flickering backlight, and i don't find why.
voltage on input line of the backlight is 130V not really steady but little fluctuation.
the return of the first strip is at 130V too, but the output of the second strip is 6V and really really unstable.
what can do this probleme pls ?
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Re: SLES 2012SVS40 mistake, need help
hello
thank you for your help
don't understand the jump wire you made
there is 4 ramp of leds on each strip, so why just jump minus from one ramp to plus and the ramp after ?
so i try just jump wire like i thought (but maybe it is not good), all leds bright up but backlight is blinking, all leds at the same time.
can you explain this to me ?
thanks
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SLES 2012SVS40 mistake, need help
hello guys,
i've got a samsung tv to repair with dead backlight
it is a edge backlight with two SLES 2012SVS40 strips.
done a mistake with my order and received a 10 pins strips kit
but the tv got 6 pins strips
do you know if i can use them with some modifications ? or not ?
thank you
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Re: panasonic 40CX400 flickering backlight after psu repair
hello
yes test with input on hdmi, not any change at all.
i want to test with direct input on 3rd pin of mp3394 but i have to find a correct voltage on board first, as this i will maybe be able to see if it is a regulator issue or a pw_dimmin problem.
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Re: panasonic 40CX400 flickering backlight after psu repair
hello,
some news, got one (??!!) led blown
so replace it, now the backlight is ok
but....
i can't rise the backlight, it always stays at the same intensity. can't rise or down it on menu : can go from 0 to 100 percent , but no change on the tv, and the backlight is very low.
i have checked pw_dimming and it is at 2.6V , on MP3394 schematics it says it goes from 0.6 to 1.6v, but can't understand why at 2.6 it is very low...
the resistance between pwdimming...
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panasonic 40CX400 flickering backlight after psu repair
hello,
this one makes me mad
got a pana 40CX400 that came with led blinking issue, no start , no backlight
after inspection , Q502 short, replace it but no more
so replace MPS3394
then when plug in all 1R00 resistor between Q502 and ground blowned, Q502 too
find that diode between MPS3394 and Q502 was defective
so replace all 1R00 resistor, Q502 and replace diode with 2R2 resistor as it is on many other 17IPS20 board
now, no blown thing !! yes !!
but backlight flickers , it start for one second...
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TNPA5608 panasonic PSU dead
hello,
make new thread to discuss about psu issue
on same tv panasonic 42E5 series, that take storm lightning and motherboard fried
the PSU not works, got 325 on big cap primary section
no other stable voltage, on primary mosfet i have got 325V on drain, 0V on source and gate
the voltage near ic 730 are unstable too
not find shorted cap
the only thing i find strange on this is only 130 on diode mode on d7211 in both ways (the diode is ok desoldered)
burnt area near primary mosfet , replace it but no fix
what can i...
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Re: panasonic 42E5X need advice before buying hdmi IC
hello
thank you for help, just remove it for now and rework burnt lines
but i have an issue with psu too, damn.
got no stable outpout voltage, and only drain voltage on primary mosfet
the source is short, refers to manual, the only way to remove short (but not try to plug in) is to remove resistor R7102 R7101 and R7108, without them D7212 pass through only in one way. with resistors soldered, shows 0 ohms resitance both ways.
don't understand that
thanx
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panasonic 42E5X need advice before buying hdmi IC
hello guys,
got a panasonic tv lcd 42E5X series, totaly dead after storm lightning
on inspection, the fault seems to came from motherboard
hdmi chip tmds361B si totaly fried (big hole in center), have to search on service manual to know which chip it is lol
don't see any damage at inspection, do you think it is valuable to buy and replace or this motherboard became just a crap ?
thank you
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hp dv6000 quanta at8 gpu problem
hello,
i have a dv6000 f700 quanta at8 laptop with gpu error.
i want to switch off it but don't find any advice about it (the motherboard could be work without gpu i know)
schematics not clear about that
can someone knows if i can do this ? and how ?
thank you guys !
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