Davewhyte Posted July 14, 2012 Posted July 14, 2012 Hi all. I have been fixing laptops and computers for about 5 years and have just come across a problem that I can find out nothing about. I have a toshiba equium a200 laptop which will start with the charger plugged in but the screen will not come on. If the charger is unplugged then the it starts fine but if I put the charger in at any point during booting it will freeze. As soon as windows has started I can plug the charger in and it will work until it just randomly freezes could be a minute could be a hour. The cursor also flickers constantly if that may shed some light on it. I would appreciate any help you could offer :) Quote
Plastic Nev Posted July 14, 2012 Posted July 14, 2012 Hi and welcome to Extreme Tech Support - Free PC Help, This sounds like the power control circuit not regulating the voltage correctly. When just on the battery the voltage is obviously correct so everything works, however if the voltage regulator circuit is duff, the higher voltage will be present when the charger is plugged in, therefore making the whole computer unstable. If you haven't tried it with the battery out, please don't as the open circuit voltage from the charger could fry something. I don't know that particular model and without looking it up I don't know if the charge and regulator is a separate board, or if part of the mother board, some are, some aren't. However, first thoughts are check the electrolytic capacitors in that area and see if any are leaking or tops split. Nev. Quote Need help with your computer problems? Then why not join Free PC Help. Register here. If Free PC Help has helped you then please consider a donation. Click here We are all members helping other members. Please return here where you may be able to help someone else. After all, no one knows everything and you may have the answer that someone needs. -------------------------------------------------------------------- I have installed Windows, now how do I install the curtains? 😄
Davewhyte Posted July 14, 2012 Author Posted July 14, 2012 Thank you for the quick reply Nev. I will look into that :) Quote
Plastic Nev Posted July 14, 2012 Posted July 14, 2012 OK, another thing has come to mind, is it the right power supply charger for that laptop? There are many different voltages used on laptop power sources, so if for example, and using my own Toshiba, the battery is 14.8 volts, in order for it to push enough current to charge that battery, my supply is 19.2 volts when not plugged in. However if that charger were to be used on a machine with only a 10.2 volt battery, it would possibly overpower the voltage regulator circuit in the laptop, so please check that out too. Nev. Quote Need help with your computer problems? Then why not join Free PC Help. Register here. If Free PC Help has helped you then please consider a donation. Click here We are all members helping other members. Please return here where you may be able to help someone else. After all, no one knows everything and you may have the answer that someone needs. -------------------------------------------------------------------- I have installed Windows, now how do I install the curtains? 😄
timez Posted November 7, 2012 Posted November 7, 2012 If you have a multimeter - try and check the voltage coming out the charger lead is what it says it should be (it will be on a label on the brick part) Timez Quote
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