Dell Inspiron 1150 Laptop power problem.
I red you have a schematic of that laptop.
Are you able to send me a copy to my email [email]tkrtom@gmail.com[/email] .
Thanks! tomDell Inspiron 1150 Laptop power prob...>
Thanks! tomDell Inspiron 1150 Laptop power problem.
I red you have a schematic of that laptop.
Are you able to send me a copy to my email [email]tkrtom@gmail.com[/email]
maybenever
Senior Member
Last Activity: 11-06-2014, 12:21 PM
Joined: 12-04-2010
Location: Kentucky
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Re: Clearing plugged holes
I use a cutting torch tip cleaning wire. There are several size cleaning wires from pin size to fine wire size. You should be able to find one about anywhere they sell welding and cutting torchs. It has always worked for me. -
Re: Dell 1707FPt No Power
Update, I was in the hospital a few days, out now. I didn't get the time to cross check all the voltages on the working & non-working logic boards. I did get it all back together and it works fine. I saved 5 monitors from the trash, repaired 4 by replacing bad caps, this Dell by replacing boards, and scrapped a 19” Proview for parts. I really wanted to get this Dell repaired because I'm remolding a roll top desk, & it's adjustable height will allow me to close the roll top to hide the clutter.
I learned a lot chasing voltage around this...Leave a comment:
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Re: Dell 1707FPt No Power
Any tinning plastc ribbon tips?...Leave a comment:
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Re: Dell 1707FPt No Power
Thanks LDS. I was pretty far down the rabbit hole with this monitor, I decided to go $10 more. I got a logic board from recycle&save (ebay), the same outfit I got the second PS board. Connected everthing, it works. Powered it off and on a few times, it goes into stanby mode (amber LED) like it should. Connected it to a computer, all seems to be fine. I didn't have much time to compare voltage points just yet, although I plan to before puting all back together. I did take time to check I310 voltage reg, when monitor is powered off, there...Leave a comment:
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Re: Dell 1707FPt No Power
I recorded the voltages on the button ribbon connector of the logic board.
Pin 1 = .00v
""" 2 = .00v (sometimes .50v and quickly droping to zero)
""" 3, 4, 5, 6, & 7 = 3.24v
""" 8 = ground
Here are pictures of back of logic board and both sides of button board....Leave a comment:
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Re: Dell 1707FPt No Power
I310
BS33P
77316
When the monitor turns on, I have 5.23vdc at pin 1, 3.29vdc at pin 2. When mointor will not turn on, I've got zero voltage on all pins. When checking between pins, I have 400ohm or more on all combinations.
I have checked continuity between the PS & logic board, all good. I have checked between button board and logic board, all good. I have 3.28vdc present on some of the pins going to the button board. I will have to get some pictures made of button board....Leave a comment:
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Re: Dell 1707FPt No Power
Great Job LDS, and your tip on reworking the end of that ribbon connector going to the button board worked just fine. I've still got a problem on the logic board and don't know what to check now. There are a boat load of fuses on this board, all check good, .05ohm or less. The voltage regulators have proper voltage. I've replaced 4 crap caps, but they weren't that bad, .08ohm ESR. The replacements checked .02ohm ESR. Don't know where to go from here. I marked the caps replaced with red in photo....Leave a comment:
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Re: Dell 1707FPt No Power
Thanks neighbor (I'm just across the state line from you), I'll give it a try.
I thought about that, Ive looked in with a large glass, can't see anything. I've blown it out, but will do some more.
Thanks...Leave a comment:
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Re: Dell 1707FPt No Power
Well, I threw the towell in on my new crappy board and ordered another off ebay. Got it here today, connected spare backlights, external 3.1vdc, it worked perfect. Connected logic board, connected AC, montior came on without me pushing the button, and would not turn off. Crap. I did get to see monitor display something, "DELL display perfection", ya, I got other words for it. I didn't have monitor connected to computer, and it never went to standby, just stayed green LED until I unplugged it. Then plugged back in, no LED light. I noticed the ribbon...Leave a comment:
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Re: Dell 1707FPt No Power
I checked all caps. ESR was great, most even lower than the panasonic FM caps I have to replace them with. I've resoldered ever pin coming thru the board. Checked mosfets and transistors, none shorted. Invertor transformers check 443ohm & 442ohm. The best I can get it to do is flash full on for a second, then off for 2 seconds, but it will do that consistanlly. Make for good Christmas lighting. One question, what sort of voltage should I expect on the pins of the power transistor, the one screwed to heatsink by the large cap? I've got big voltage on...Leave a comment:
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Re: Dell 1707FPt No Power
I tried driving the ccfls with the PS 5v w/ a 100 ohm resistor, nothing happened. Connected external 4.7v & lights flash on, then off for 2 sec. & repeat, for about a minute, then nothing. I was able to snap a picture during a brief sec they were on. Here also is picture of my external power source.
Yes I can & I will. I actually have not checked all the caps on this new board, but I will....Leave a comment:
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Re: Dell 1707FPt No Power
I didn't notice any flickering or dimming before they went out. I can make some pictures.
Thanks...Leave a comment:
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Re: Dell 1707FPt No Power
Today didn't go as planned, but finally got to do some testing. On the main board, top left voltage reg, pin 1 = 5.16v pin 2 = 3.29v pin 3 = 0v. reg below that one, pin 1 = 3.29v pin 2 = 1.80v pin 3 = 0v. The top right voltage reg had 0v on all pins. But this reg checked good when the monitor would power on (one of the few times), and it had 5v input & 3.3v output. Reading were the same with or without lvds cable connected. Output voltage was stable with both boards connected, 5.16v. I removed solder & resoldered all those joints selldoor had circled...Leave a comment:
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Re: Dell 1707FPt No Power
I'm on it, 1st thing in the morning. I gotta go away now. Will report back ASAP.
A Big THANKS...Leave a comment:
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Re: Dell 1707FPt No Power
I applied flux and resoldered all these joints, but did not remove old solder. How about I do this on the new board, sence it almost fired up the ccfls?...Leave a comment:
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Re: Dell 1707FPt No Power
Would those be I301, I311, & I318? I've checked 318, it's 5v input, 3.3v output. I said 5v earlier, my bad. Have not checked the other two, if tha's the ones you are referring to.
Another correction, the voltage on the new board at the large cap is between 168.9 & 169.4vdc.
Her are photos of new board....Leave a comment:
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Re: Dell 1707FPt No Power
Don't have any pictures of new board yet, it's exactly like my old board, only with all KY caps.
AC voltage bounces very little, between 123.2 to 123.1vac....Leave a comment:
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Re: Dell 1707FPt No Power
All fuses check good on PS board. Output voltages on PS pins (without main board connected) bounces between 5 & 5.3vdc. Voltage on large cap bounces between 166 & 168vdc. With main board connected, voltages on pin outs bounces between 4.7 & 5vdc, large cap voltages drops to 162 & 164vdc. Usually, the power button on front does nothing. Sometimes, the led comes on as soon as AC is connected, then won't turn off. When I connect spare ccfl and apply 3.1vdc to on pin, tubes flicker 3 times, about 3" of the tube on the wire connected end,...Leave a comment:
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Re: Dell 1707FPt No Power
The money went to IT Express 101, and they are the ones that shipped it from Austin, TX, but great.pc.parts are the ones responding to my messages.
I've checked the voltage reg on main board, it's putting out 5.0vdc. What about voltage regs on the invertor board, where are they?
I started out with output voltage that dropped like a rock, reflowing & resoldering has stopped that. Now, just unstable output voltage. I've checked all caps, even the ones I pulled off the board, all have low ESR & correct uF readings (I now...Leave a comment:
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