rogfanther
Badcaps Veteran
Last Activity: Today, 04:56 AM
Joined: 07-15-2006
Location: Curitiba
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Can you try with another fan ? If yours is not generating the tach signal, maybe it is defective. -
Measure voltages on them, without keyboard connected. Only those with voltage present ( usually 3.3V) would be candidates.
But are you sure the motherboard is working ? Otherwise even with the correct pins you would have no start.Leave a comment:
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Measure resistance to GND on pin 5Leave a comment:
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With all power disconnected, measure resistance to ground of all coils....Leave a comment:
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Too little information, but yes.
If possible, post pictures of the affected area, the component, and also inform brand and model of the board.Leave a comment:
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Well, start with checking the flat cables between the touchpad and the motherboard. Are they installed ? Not mangled ? Are they installed in the correct orientation ?Leave a comment:
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It is a P-channel, so yes, it needs a lower voltage on gate to conduct.Leave a comment:
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Post the question in the BIOS sub-forum, with the relevant data about the motherboard ( there are sticky topics in that forum talking about it ) and someone may have a compatible bios for you to write on your board.Leave a comment:
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Depending on the size of the clip you tried using to read the bios chip it is possible to have damaged the board, yes.
Can you post good, clear photos of the area of the bios chip, and also of the suspect clip ?Leave a comment:
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Either not turn on, or mantain the same behavior. You need the bulbs for the circuit to think it is all ok and keep working.Leave a comment:
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So, it is very possible the keyboard was failing after she dropped some liquid in it. Then it was left unplugged for some time, and said liquid corrosion continued to grow inside of it. And now is shorting some pins, or have destroyed some component pads. When possible, post the relevant pictures .Leave a comment:
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Can you remove the RAM and see if it beeps ?Leave a comment:
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Well, you would need to carefully flex the boart to find the region where curving makes the phone start/stop working. But if the problem is with the soldering of some bga component, it is harder to diagnostic or solve.Leave a comment:
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What is the voltage on bios chip pin 8 ?
Please post pics of the bios chips region also.Leave a comment:
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Please re-check those resistance measurements in the coils. One probe to ground, one probe at the coils.
With those 0-ohm measurements, you should have some pretty nice shorts on the board.
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There are some adapters to connect to it, but it will be a delicate operation. The best is to remove it and then connect it to the programmer.
Sorry, but as you say you are inexperienced with soldering, trying to work with this may make things very worse .Leave a comment:
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Good But check the output diode and the startup cap, also. before installing the new TNY.Leave a comment:
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How did you test those ports ?...Leave a comment:
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Some are covered in lacquer, others are not. In the situation it is now, hard to say if that is the melted enamel or burned lacquer.
Did the psu fan failed ?Leave a comment:
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You will probably find it only in another dead psu of that model.
One possible way is to unwind the wires, taking not of the number of turns, and recreate this coil with another core. This one seems well cooked, and will have lost its magnetic properties, or at least changed them.Leave a comment:
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