I have a satellite M105-S3074 and had an accident where the lcd got broken, i tried to connect it without the lcd but didn't turn on only beeps but nothing on an external monitor,after inspecting the motherboard I found that the Q35 transistor is completly burned and can't read the reference. Could anyone tell me where I can find the servicemanual for this model or the reference af the transistor? Thanks a lot
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Did the new transistors shorted out? You maut make sure to checkt the gray tuning caps in the inverter output sections, if they are bad, the inverter will run at the wrong frquency and burns uo the transistors. You also need to look real close at the solder joints in the inverter sections, especially around the inverter transformers.
12vdc is OK? http://s807.photobucket.com/albums/yy352/budm/Dell%20E173FPb/
It sounds like your LCD panel TFT (Thin Film Transistors, each panel has millions of the transistor) driving circuits are failing, it will get worst with more lines appearing. New panel will be needed.
Learn about how LCD panel is made: http://www.plasma.com/classroom/what_is_tft_lcd.htm
I do this repair for a broken LCD on the S50's. I am on Ebay and my user
name is rarey57siriusXM. Look me up I also do LCD and scroll wheel
repairs for the Stiletto 10 and 100's. Cost of this repair service is
$24.95 and that includes free priority mail shipping back to you on all
these different repairs. Thanks
This worry's me a little I have some ?'s that i need answered first before you started your cleaning did you ground your self and wait the 10 to 20 min time after you shut-off and unplug the computer before removing anything from the computer. If you did then before turning it back on did you make sure you replace everything in it right place. Sound to me like ram my have not been in all the way.
But it all comes down to one thing you need a new motherboard they really normaly don't make replacement parts for them and in the long run you don't know what else could be toasted.Most likely the bios chip went too.
Sounds like you have fried your output transistors. They can be replaced if u have the patience and know-how. Also check the resistors near the transistors. Some of them may need to b replaced too. I fu replace the transistors and the resisitors are still fried, u run the chance of burning up the new transistors again. I usually just replace both items since it's not that expensive and I'm doing the labor. What have you got 2 lose?
all resistors & transistor are the parts of power supply connected to switching ckt.
so there is a possibility of switching transistor or associated components failure.
please check it.
if you are in need of schematic it is available at