Question about Toshiba Satellite A25-S207 Notebook
Hi, this is a very common question. Well as you say you need to first see if you adapter is actually working. Well usually they have some sort of LED showing connection to the AC power, some however do not. If the you do and the LED is light nice and bright, then most likely your power supply is OK, now I say most likely as the Power supply isn't under any "Load" it indeed may fail when "Loaded" or connected up. Once connected if say the LED seemed to dim, there indeed maybe a problem, however most PSU's are "Smart" and they sense any faults, and shut the PSU down, and disconnect from the mains. When the fault is removed, it will resume operation.
An empirical test is obviously to plug it into whatever it's designed to power and if it works, Power led comes on and the device works, it is OK, and that is also flawed as perfectly good looking PSU, simply seems OK, but do NOT work properly and cause the attached device to malfunction. As power supplies can be, sort of, variably faulty from not working at all, to, too high and Too low Voltages, to allowing AC "Hash" and spurious signals through to the device it's connect to and this causes problems and may indeed destroy the attached device. They cause all sorts of problems and are often overlook as a problem source too.
It has been my rule of thumb for many years now that IF I even suspect a supply, I replace it. As if the PSU isn't right, then NOTHING else can be..
As really the only way to guarantee a PSU is with a meter and an oscilloscope, plus the time and proficiency to test it.
Of course, usually simple testing with a volt meter is sufficient, or indeed simply hooking it up to the device.
Now usually if it is the power jack, when you wiggle the cable near the socket, the connection will go off and on. be careful here as often it may be the Plug, you see, the cables on the PSU often break/bad connection at this juncture on the Plug, It breaks commonly, there and where they leave the PSU, and again, mostly in the middle,
Hope that helps.
Posted on Aug 25, 2010
of all, you need to make sure your power adapter is providing enough
power to both run the laptop & charge the battery. A very good way
to do this is to compare your laptop voltage & ampere requirements
(written on a sticker on the bottom of the laptop) with the voltage
& ampere ratings of the power adapter. Voltages should be the same,
or the power adapter's voltage about up to 0.5 volts more than the
laptop's voltage rating. Amperage of the power adapter should be at
least equal to or greater than the laptop's rating. It should never be
less than the laptop's rating, or else the power adapter will be
providing insufficient amperes to charge the battery. Of course, the
power adapter's nominal amperage might be ok, but it degraded on usage.
You can verify this by testing using a good or new power adapter.
If the battery did not charge using the new power adapter, take the battery off the laptop, & using a dry tooth brush, scrub in between the fins of the battery connector on the motherboard & on the battery it self, then put the battery back into the laptop & try again.
If this still did not resolve the problem, then the battery itself could be bad. Try it on another laptop, or try a good or new battery in your laptop.
If this did not work, there might be a possibility that the charging circuitry on the laptop's motherboard is defective & needs servicing. In order to do this, the laptop needs to be disassembled & the motherboard checked for defective/burned out components in the area near the DC jack. Any defective/burned out components found should be replaced, or you might need to replace the laptop's motherboard altogether
Posted on Aug 25, 2010
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Posted on Jan 02, 2017
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