HI,please can you help me I plugged up the power plug and my laptop still will not power on,i have tested power supply the right volts is coming out at small plug end that you put in think pad 2658-bum cheers from john
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Most external hard disks use a 12 volt 2 amp power supply. The modern ones are small and cheap. Be aware the power plug should be the same as the power plug on the old power supply. and the polarity also.
glow plug light and glow plug are not on same system
check at gow plug conection (top of valve cover both side
follow from relay front valve vover right side silver box)
power 12 volts on all 4 wires in both conector left and right
if not replace relay if 12 volts relay ok (test light clip on ground)
then check glow plug (test light clip on positive ) touch wires going
to glow plug should light up if ok (quick test ) if any fail replaced
if all seems ok look at the oil injection system most common
problem with these motors I have yet to replaced a glow plug or relay
hi , it might be the mother baord power conector over time the burn out . lets do some test. 1, try another power supply of a same model and watts. 2, take out the battery try new power supply . if this doesnt work then chances are the power circuit board has failed might have too replace mother baord thanks hope been some help.
I think you should check the real power supply ... 120 V in and what comes out ... volts (ac - dc) and amps or what fraction of an amp.
Please compare the old with the new power supply. The new power supply should be the same volts - same kind (AC or DC) and at least the same amp rating. You can use higher amp rating but not lower - lower will burn up - literally)
Volt meter ... always set it above the suspected voltage. Batteries are always DC. Houses, buildings, etc always AC. Power supplies - could be mixed - ac in and dc out.
So if you were measuring in your home, you set the meter to 130 or higher on the AC scale. If you were doing your auto, 24 volts DC (or so).
House current, probe color doesnt make any difference. Should read about 120 Volts between the narrower (or right side/ground down orientation) or the two slots and the wider of the two shots (wide should be the neutral side - ground on the bottom). You can prove the hot side by measuring to the ground. White wire to ground = no reading. Black wire to ground = 120 volts. (The black and white are INSIDE the electric outlet. You can use either probe to do the measurement.
You have a malfunctioning powere supply. To test the power supply, you can use an amp meter to check how many amps it puts out to see if it is working ok. Or if you can simply connect it to another laptop with same model if available. These power supply have an output of 19 volts by the way. You can also use another power supply if avialable to see if its indeed the power supply.
Hi there. Make sure you have the voltage and amperage right first before you try and power up the motherboard. Most laptop motherboards run on 15, 19 or 20 volts and take a different amperage like 3.42A for example. The power in will be displayed underneath the ibook so take a look there. Don't plug a 24 volt power supply into it unless it specifies that because you could damage the board.
Sounds like a common problem
when you plug the power pack into the laptop its power light goes off because there is a fault. Most commonly this is connected with the plug or the socket into which it goes or the motherboard.
visually inspect the socket, if the central pin is loose thats your problem, if not then check the plug/jack bend the cable on it as these are prone to breaking. wiggle it around whilst checking the power button and status lights if none of that works then you need to strip the laptop and perform a continuity test on the first stage.
ie between socket and motherboard. please note for any sign of exposed cable and remember electricity hurts on contact be carefull. especially if you test motherboard for voltage.
ps the switch is pretty reliable and i would not poke anything in that hole just yet.
go to radio shack get a 12 volt 1500ma power supply with I belive it is a N% plug end but any how 800 ma to 1500 ma should run this and the plug end is standard plug with plus 12 volts on the inner side and negitive on the outer case side look at the back of the TV or the old power supply it sould have info on voltags and amprage, and the plug as to inner voltage and outer voltage on the plug any old time radio shack or electronics shop should be able to help you bring in the flat screen if need be as if you know its 12 volts then It wont mater weather you use a 1000ma 1500ma 12 volt ubnaversale power pack as the tv will only use the current needed so more MA is good the only concrn you have is the right mini barrle plug and the right side of +/- voltage on that mini plug being most use + voltage in the inner most circle and - 12 volts on thje outer
If you have a volt meter measure the power coming out of the power
supply and make sure the outlet is good that you are plugging it into.
Try resoldering the connection on the circuit board where the power supply plugs into it. There may be a loose connection or a crack in the board that you could jumper around using a short piece of wire soldered around the break.