Re: Compaq cq40 no power issue 3v5v
3v and 5v comes out of TPS51124. So that means it has to be operational before you get voltage on ENE KB926qf. Change TPS51124
opamp
Senior Member
Last Activity: 07-01-2014, 01:00 PM
Joined: 12-20-2012
Location: Texas
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Re: Compaq cq40 no power issue 3v5v
Do you have voltage on PL302 and PL303? if not troubleshoot PU301Leave a comment:
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Re: DV5-1000 led error code
Yeah i figured.... I guess I was kind of hoping it wouldn't have come to that since I don't have a stencil for that bga. I guess I'm screwed until it arrives.Last edited by opamp; 06-24-2014, 11:18 AM.Leave a comment:
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DV5-1000 led error code
I got a dv5 that has led error code. It blinks 3 times and it keeps repeating it self which tells me is a memory error. I have already changed the memory stick and cpu for known good ones and have checked the memory slot for voltages. I found that 3v,1.8v and .9v are present. Anybody have any idea? -
Re: weird screen
Replace the screen, a new cable will not help.Leave a comment:
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Re: Acer aspire 5920 short circuit
Have you made one? what would be the output current?...Leave a comment:
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Re: dv5-1233se bios needed
I didn't make a backup.Leave a comment:
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Re: Lenovo G585 powers on and stops
Have you checked for shorts? find the schematic and start with the mosfets.Leave a comment:
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Re: dv5-1233se bios needed
Thanks Jonas, I was able to flash it successfully unfortunately the the laptop is still completely dead no signs of life.Last edited by opamp; 02-11-2014, 05:22 PM.Leave a comment:
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dv5-1233se bios needed
I need the bios for a dv5 intel
DV5-1233SE
DAQT6BMB6GO rev:g
Thanks. -
Re: Not detect HDD & ODD Acer 4530
Then go for it replace the chip.Leave a comment:
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Re: Not detect HDD & ODD Acer 4530
Find the schematic and check the mosfets on that power bus to make sure the HD and ODD are receiving power before you do anything else. This drives have always on voltage.Leave a comment:
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Re: Toshiba Satellite M30 schematic
Here's one for an m35 see if it helps....Leave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
Without a schematic is very hard the only thing to do is to replace all bad parts that you find and hope it works.Leave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
Make a list of what's bad so you can order it. What were the readings on the mosfet that you say are bad?...Last edited by opamp; 02-11-2013, 08:21 PM.Leave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
Yes pin1,2,3 are connected together and pins 5,6,7,8, are connected together only pin 4 is not because that's the gate . If the're voltage in pin 4 mosfet is on if no voltage the mosfet if off. Just image pins 1,2,3 are the pin on side of the diode and pins 5,6,7,8 are the pin on the otherside of the diode and 4 pin turns it on to allow voltage to pass.Leave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
This is how a mosfet works pins 1,2,3 are the same pins5,6,7,8 are the same. Pin 4 is the gate and supply's voltage to the mosfet so don't touch pin 4 unless you're checking for voltage. When you check the mosfets your DMM is on diode, right?Leave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
Here's the link for the mosfets. I couldn't find the 5030al but these should work they have the same ratings.
[url]http://www.ebay.com/itm/2pcs-7030L-PH7030L-N-channel-TrenchMOS-logic-level-FET-NXP-Brand-New-/110870979953?pt=LH_DefaultDomain_0&hash=item19d06ce571[/url]Re: ASUS u31sd LAPTOP WILL NOT TURN ...MOS-logic-leveLeave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
Those are bad too. Check all the them, I mean both sides of the board....Leave a comment:
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Re: ASUS u31sd LAPTOP WILL NOT TURN ON
Start checking the mosfet these are numbered 7030AL look at the picture. Put your neg- probe on pin 8 and the pos+ on pin 1. They should have reading one way only....Leave a comment:
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