Re: Im an idiot, and so can you
On page 39, that IC is listed as U51. On my laptop U51 and all listed resistors in the circuit are physically missing from the PCB. The solder pads are there, the white slkscreen labels are there (it says U51 next to the 5 solder pads where the chip should be. Same for the included circuit resistors).
Maybe this means just means that was a part of a revision change not reflected on this schematic??
Also, the IC getting hot is labelled U73, which isnt even in the schematic (I ran search in pdf, pulled up matches...
scuba03
Member
Last Activity: 02-15-2012, 07:16 PM
Joined: 12-22-2011
Location:
-
Re: Im an idiot, and so can you
oh god, i just found out that the embedded ram modules are bga. That just took a simple fix and made it a nightmare. Any suggestions? There is not that many solder balls, and its pretty far away from other components....so....hot air gun? danger dangerLeave a comment:
-
Re: Im an idiot, and so can you
I thought I put that up there, apparently not, my mistakeLeave a comment:
-
Re: Im an idiot, and so can you
My board is rev. F that diagram is rev. A, btwLeave a comment:
-
Re: Im an idiot, and so can you
Thank You. Lol the power connector and plastic assembly is bent sideways lol I didnt notice that before. Ill have to resolder. I wish there was a way to bypass the onboard ram, and just use the ram installed in the socket, then I wouldnt even need to remove the 2 bad embedded modules and find/resolder new ones on. Im not even sure they sell them without having to buy like 1000, maybe I can buy a gpu and pull them off provided they are the same obviouslyLeave a comment:
-
Re: Im an idiot, and so can you
My fiance and I just split up, I went to the storage unit to divide the furniture and cars. In the unit I found an old Acer Aspire One AOA150 that I bought her back in 2008. It has an Atheros wifi card that is plagued with problems. Dont ask how, but she managed to step on the laptop. It has onboard RAM 1GB. The only visible damage is 2 of the onboard RAM modules. If you can find the schematic for this I would be greatful. Its not necessary, its just something I can do to take my mind off things for a bit. Its a nice little notebook with a nice screen....Leave a comment:
-
Re: Im an idiot, and so can you
I did see that in the schematic. Yes, Im fairly certain thats the clicking noise, but Im just curious about the noise its making inbetween the clicking. Its like a faint scream, click, faint scream. over and over again. It never makes it off park, at first I thought it was because The chip that tells the heads where to travel (Entron and heads contacts) was bad too, but what you are saying makes more sense. I did some research on the VCM, and I dont think Its the type of flash thats rewritable. Some types can only be written once, then other types...Leave a comment:
-
Re: Im an idiot, and so can you
Im curious how these 2 parts, ISL6236, and the other IC get so hot just with the power plugged on. Its bugging me because something should be preventing current like that until I press the power button. As soon as I plug it in they get hot. That would indicate a bad resistor, correct?...Leave a comment:
-
Re: Im an idiot, and so can you
Oh by the way, did Acer put the Part # 55.4U101.001 on top because the mainboard is actually made up of 2 different boards, the both of those boards together equal 55.4U101.001? Because the mainboard that I need info on (the one u gave me) is 48.4U101.011, and the unimportant piece (just the card reader) is Orta 48.4H004.011. So maybe Acer, for their inventory sake, took both those part numbers, and combined them into one complete part number (55.4U101.001)? Because There Is also 5 more part numbers I didnt give you. Why so many Acer grrrr. Anyways,...Leave a comment:
-
Re: Im an idiot, and so can you
Wow, You are amazing!!! How did you find the schematics? I have been looking everywhere for them, but couldnt find them. Thank you so much, I am actually very greatful for this. As for as the hard drive goes, Yes, It is the motor controller, and if what you said is true about this particular IC containing custom-written/changeable parameters, than im lucky because I write EPrOM and Jtag code for my work. Thats what I needed to Know. See, I didnt wana swap my pcb with a doner, that rarely works now-adays, especially with Hitachi, no matter how close...Leave a comment:
-
Re: Im an idiot, and so can you
If anyone can point out a good place to start, i would be very greatful. Sometimes, running blind with a multimeter can damage certain components when applying current through them. Any help would be greatly appreciated, and I would be very thankfulLeave a comment:
-
Re: Im an idiot, and so can you
Also, thanks for the info on the Hard drive. That sucks, I guess Im going to just have to buy the exact hard drive, and take the firmware board. I dont want to ruin a good 1TB drive, so maybe I can find a drive that has a mechanical failure. Oh, I dont know how this happened, but the chip on the HDD I listed earlier was Not the bad chip. Dunno how I spaced out that bad, but the chip to the left, labeled 0a56511, which is the motor control chip. Now, the drive spun up, but when the chip got hot the drive would click. now that its not hot, the drive...Leave a comment:
-
Re: Im an idiot, and so can you
Thank you for your reply,
The model # is 554U101001G83301A3A201C
The part # is 554U101001G843E5AD32000
Out of these 2 numbers, 55.4U101.001 seems to be the number, the rest is maybe config codes??
The weird thing is, Printed on the board itself it says: ORTA MB 48.4U101.011
The 2 numbers I gave you above came from the stickers with the barcodes on them.Leave a comment:
-
Re: Im an idiot, and so can you
here is a pic if the ISL 6236(circled in yellow). Im sorry the quality is so bad, My camera isnt the greatest
...
Leave a comment:
-
Im an idiot, and so can you
Acer Extensa 4420-5212. Laptop
I was replacing a broken screen. After I replaced it, I plugged the laptop back in, pressed the power button....and....nothing. No power, No LEDs, nothing. Will not run on battery or AC. Laptop worked great before, just had to plug it in to external display.
After checking (which is what I should have done in the first place) the new ribbon cable, I noticed that even though the wire colors were the same as the old one, the wire pinout (from connector A Laptop mobo, to connector B LCD Screen) was different from the original old ribbon... -
Re: New Members - please post your introductions here
T/S is my addiction, and you all are my enablers
Leave a comment:
No activity results to display
Leave a comment: