I was wondering if anybody can help me.I accidentally swapped plus and minus when I fixed my DC jack and blew up sth on my motherboard.Now It won't register the adpater at all.I found that one of tha transistors are faulty
2N70002 but I can't get it anywhere so I tried to replace it with some other but as soon as I plug the adapter in the mosfet blows up again.So either the one I have it's not the right one or there is some more damage done.
Would anyone had a circuit diagram???I'll pay 50$ on yor account if I fix it:-)
If you are really ready to pay, I suggest that you refer to Dell center closest to you. Laptops inner parts are very sensitive and should never be modified by a non-expert. Not to mention that you can't replace a transistor on the motherboard with just any other one, or else it would cause much damage, which ,I afraid, is already done in your case.
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You can take it to a computer repair shop so they can extract the files you want, The problem is a motherboard issue, the DC jack in the laptop may have broken free, this will require a technician to evaluate the hardware.
It is possible that it could be a bad solder joint.
It could also be that the connector is a different one.
Some laptops use a dual voltage power structure.
On the Inspiron E1505 (same as the 6400) I have it requires the dual voltage power. This is where the outside of the plug is the ground and the inside of the plug is one voltage and the center pin is yet another voltage.
In this case, (if I remember correctly) the inside of the plug is like 19.5 volts and the center pin is like 9 volts. The inside of the plug supplies the power to the laptop and charging circuit and the center pin tells the laptop that the power adapter is plugged in and should start charging.
If the laptop recognizes the Vostro power supply then this is a good possibility. Either way, it is worth getting it checked out. The last thing you want to do is burn out the charge circuit on the motherboard by having the incorrect power supply plugged in to it. It may work for a while or it may work forever but you never know.
If it works from DC jack try to change the battery first, for example to the same battery from another comp. If DC jack is broken and laptop don't works from wall outlet better change the jack in service center. Disassembling Dell is hard work...
hi there so once you see the dell logo keep on tapping f8 and check if you can enter the safe mode, if not tell me the lights because that means thats its a no post issue and we might need to reseat your memory.
Unplug the battery from the laptop and then plug the AC adaptor into the laptop. If the green light still goes off then your motherboard is shorting out the adaptor and the motherboard needs to be replaced.
The loose connection for the AC adapter means the motherboard needs to be replaced or the AC adapter jack on the motherboard needs to be replaced. (With Labor, it is about the same cost to buy a new motherboard as it is to have the old one fixed)
Motherboards are available on EBay for around $100
1.If cause by tea or drinks,disconnect the keypad from the system and dip it in warm water for 10mins shake it,press each key several times while still in water.
Dry it thoroughly to have the water off the keypad and fix it back.
2.if the problem still exist, change the keypad.