Thank You very much.
That mosfets I tested before, they are OK.
But I measure that voltages and on pin 1 of PQ 905 was 19V and behind PQ905 and on PL902 was 0V.
So I desoldered it and solder it back and now board is booting.
But PL902 making some weird loud whistling noises on boot. After some time it stops. And its only 9V on it.
So it looks like a problem of some capacotors around.
Or do you have suggestion why it making that loud noises?
Thanks....
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
[ATTACH=JSON]{"data-align":"none","data-size":"small","data-attachmentid":3255142}[/ATTACH]
Markings are CDP70 la-e141p.
I don't have quality photo, but i will send it as soon as possible.
Pin 3 goes immediately to another layer of PCB.
[URL=filedata/fetch?filedataid=334102][ATTACH=JSON]{"data-align":"none","data-size":"small","data-attachmentid":3255140}[/ATTACH][/URL]...
Leave a comment:
-
Hello,
I have similar problem, laptop was water damaged.
After cleaning it woks from battery/not charging, but only until battery died.
I replaced some rotten resistors, now its recognized by USB-C charger, but it's stils dead.
I got 3,3V, but not 5V ALW.
On PU901 PIN3 i got 0V. I can't find PR929 on that board.
What can cause such problem?
What program you use for opening .cad BDV files?
Thanks....
Leave a comment:
-
Samsung 740N Inverter problem (blowning mosfets)
Hello,
i have samsung monitor with IP-35135B PSU.
Display does not light, i changed bad caps, pico fuse, two mosfets (I use IRF7389), then monitor starts to work.
But after few hours of using it was going black again. Mosfets are blown again.
Thanks for helpLast edited by Honziq; 09-08-2014, 11:55 PM.
-
Re: Lcd screen vertical and horizontal lines
Can anyone help me? Please.
Leave a comment:
-
Lcd screen vertical and horizontal lines
Hello,
i have a LCD monitor/TV sencor SLT2222DVBT. After turning on screen shows vertical lines that fades out after minute and few permanent horizontal lines.
First image is taken after turning on. Last two is taken after few seconds of turning on.
[ATTACH]90836[/ATTACH]
[ATTACH]90837[/ATTACH]
[ATTACH]90835[/ATTACH]
Edit:
Here is some videos:
[url]http://youtu.be/kGnS8L9h9sk[/url]
[url]http://youtu.be/etzsRS5K394[/url]Hello,
i have a LCD monitor/TV sencor SLT2222DVBT. After turning on screen shows vertical...Last edited by Honziq; 07-23-2014, 12:23 PM.
-
Re: YP1922-4L LCD power board repair
Thanks,
i try to swap tubes with one laptop screen tube.
One of the top tubes is bad. When laptop screen is connected TV running always.
Thanks a lot.
Leave a comment:
-
Re: YP1922-4L LCD power board repair
Hello,
I am in Czech Republic, mains voltage is 220V....
Leave a comment:
-
Re: YP1922-4L LCD power board repair
S1 to S2 - 1080 Ohm
S2 to S3 - 1092 Ohm...
Leave a comment:
-
YP1922-4L LCD power board repair
I have LG LCD TV. When I turn on the TV backlight turns on for 1 sec and then goes back off. I think it is bad invertor. But i dont know, which of components is bat. MOSFETs and caps seems OK.
Help me, please.
Thanks.[ATTACH]90268[/ATTACH]
[ATTACH]90269[/ATTACH]I have LG LCD TV. When I turn on the TV backlight turns on for 1 sec and then goes back off. I think it is bad invertor. But i dont know, which of components is bat. MOSFETs and caps seems OK.
Help me, please.
Thanks.[ATTACH]90268[/ATTACH]
[ATTACH]90269[/ATTACH]...
-
Re: HP 620 does not turn on
Thanks, and do you have schematic? Please. I cant find it....
Leave a comment:
-
Re: HP 620 does not turn on
Thanks, i buy new one and try it....
Leave a comment:
-
Re: HP 620 does not turn on
I try to reflow them, but nothing has changed....
Leave a comment:
-
Re: HP 620 does not turn on
And what is the nec tokin chip under the cpu?...
Leave a comment:
-
Re: HP 620 does not turn on
This is an Intel celeron model.
How I can reprogram Bios?...
Leave a comment:
-
HP 620 does not turn on
Hello,
My HP 620 Laptop does not to power on. When adapter is connected ntb is charging, when I press power button, laptop lights up, DVD drive and hdd working, but lcd is blank. Only flashes wifi button from orange to white, and from white to orange. I try to disconnect all devices including battery, wifi card, dvd, hdd, but still same problem. When I remove RAM Capslock goes to blink. Please can someone help me?Last edited by Honziq; 05-23-2014, 12:26 PM.
-
Re: Acer Extensa 5430 Dead Board
And is this the problem?
Is the mosfet connected to the GPU?...
Leave a comment:
-
Re: Acer Extensa 5430 Dead Board
On G is 4,52V
ON S is 0,35V.
ON D is 1,75V.
It is very hot and making little smoke when is powered on.
On battery I can turn on the laptop, but not turn off.
On AC power supply is turning on automatically, when i connect power....
Leave a comment:
-
Re: Acer Extensa 5430 Dead Board
On this schematic i find it is mosfet.[ATTACH]86701[/ATTACH]
On page 47 you can see it.[ATTACH]86702[/ATTACH]Re: Acer Extensa 5430 Dead Board
On this schematic i find it is mosfet.[ATTACH]86701[/ATTACH]
On page 47 you can see it.[ATTACH]86702[/ATTACH]...
Leave a comment:
No activity results to display
Show More
Leave a comment: