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Ac power doesnt work only in battery mode,adaptor output is ok

Ac power doesnt work only in battery mode, Ive measured the adaptor voltage 19.4VDC which is ok please need your assistance

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Sounds like the power connector (where you plug into pc) is going bad. try twisting / wiggling connector. pause for a few seconds between twists to give circuitry chance to reconize power input. sometimes there is a green led that will light up when power adaptor is inserted. you can use that as a reference.

Posted on Jun 03, 2009

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My sony handycam DCR-TRV340E is not charging at all, dont know if its to do with the battery or the AC power adaptor


First, check that the camera switch is in the off (charging) position.
If this is OK, Check the battery output connections for voltage: use a multimeter.
To check the charger, put a load resistor across the output terminals (about 1000 ti 2000 ohms) and again, using a multimeter, check there is a charging voltage. Alternatively, if the camera operates OK with the charger attached and switched on the charger is OK, AND, the problem is then in the charging circuit from camera to battery. If the battery checks OK as in the beginning, then you will need a Sony repair man who needs to know all the results from your testing above.

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Power problems


Have you tried a new battery?
Thanks,
Lee

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Amp turns on but puts out no sound except for faint noise which dies out after a few seconds.


It sounds like a defective/incorrect AC-to-DC adapter may have caused your problem. These adapter come with different output voltages, AC or DC output and different amperage ratings. AC-to-DC adapters list the polarity of the DC voltage as it relates to the DC power plug and you must match both the devices voltage and power requirements. As for the amp...not working on batteries either, I would suspect output transistors or IC.

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No power in my laptop. I press power button and only see red battery light for few seconds.


please measure the output voltage from the adapter , see the label printed in your adaptor if the voltage read with the exactly voltage: exampe label printed: 17.8, and you measure 17.8 the adaptor is o.k
If do not the adaptor is faulty. repair or replace
However you must try with the battery to Start, of course the battery must be charged in full, if the battery is o.k the laptop will be on. If not the power supply inside is faulty. REPAIR.
God bless you

Jul 30, 2013 | Advent Modena M101

1 Answer

My remote speaker system works with the batteries but not with the AC adaptor plugged in to the speaker.


I would suggest to check AC outlet first where adaptor is pluged in,if Ok measure output voltage from adaptor to see if there is any (using any voltage multimeter with AC/DC)
Check label on adaptor shold be writen AC or DC output ,and value 3V,6,9,12,24,48 etc...
If adaptor is ok then problem is power jack mounted in to the speaker (cold solder joints' or damage)

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1 Answer

Lenovo laptop(8932) will go into a sleep like mode (you can still see the screen, very dim) when plugged into ac adaptor. Doesn't do it with battery power. Changed system board, power adaptor - no...


Good Day Psmith!

It looks like the AC adaptor is not making the right supply voltage needed for your laptop.

If you have a multi tester, you can test your ac adaptor to see if it has stable 20V voltage output supply needed for the laptop to make it work.

Set your tester to DC range. Plug the ac adaptor to your wall socket. Hold the other end of the ac adaptor (the one you connect to your laptop. Insert the red (positive) lead into the center of the adapter pin, then touch the black (negative) lead to the outside metal part of the pin.

Read the display in your tester. If the adapter is working properly, the meter should read between 19 to 20 volts of the rating. If the adapter is faulty, the meter will read below 18volts.

If that would be the case, I'm afraid you will need to replace your ac adaptor.

You can purchase online a replacement ac adaptor for lenovo 8932.

1. From this site, it costs $34.99 + $8 https://www.ebuybatteries.com/product/models/2_IBM-Lenovo-AC090W008T15_IBM+Lenovo+ThinkPad+R61+8932.htm

2. From this site, it costs $39.95 http://www.eznsmart.com/p-31667-lenovo-thinkpad-r61i-8932-laptop-ac-adapter-replacement-20v-45a-90watt-charger.aspx



Please accept my answer if this is the information you need.
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Thank you for asking Fixya.

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A transformer type (Linear Mode Power Supply) AC to DC power adapter with a 9.V nominal output, measures about 12.V without load when tested with a multimeter. A power adapter with a nominal output of 7.5 V, measures a little over 9.V. Considering a number of people across different forums reported the adapter's measured power output as 12.V, I think the nominal rating of the AC to DC adapter should be 9.V. However, keep away from Switch Mode Power Supplies.

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Will not recognize AC POWER, Running from Battery only- now battery is dead.


The adapter might be faulty
Check the adapter with multi-meter, the voltage reading should be slightly higher than the voltage output that is printed on the label on the adapter.

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1 Answer

Laptop is nmot working


hi,
welcome to fixya,
as u said that ur laptop is not working and it is not booting,i mean is it a dark screen or do u see the lights on the computer,can u clarify me pls...u can try and safe mode and if it doesnt load in safe mode then what u can do is that disconnect the ac adaptor and take out the battery and then without ac adaptor and the battery press and hold down the power button for one minute and then release the power button and then connect the power cord and put the battery back in and then turn on the computer,and if still it doesnt turn on then try and connect with the different wall outlet and if still doesnt turn on then try with the different ac adaptor and still if it doesnt work then replace the motherboard and the ac adaptor.

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Your phone did expirence a surge that probably blew the ac adaptor which happens most of the time, u can buy one of those universal adaptors and look on the back of the old adaptor for the output voltage it will usually read between 3 and 8 volts DC.Set the universal adAptor voltage to the setting right below the voltage output on the back of the ac adaptor.

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