-1
votes
1answer
123 views

Incompatible adapter for Lenovo laptop [duplicate]

I ordered online for a Lenovo 65W AC adapter for Lenovo G550 laptop. My original adapter had specifications: 19V 3.42A (64.98W) While the one I got has specifications: 20V 3.25A (65W) I want to ...
3
votes
2answers
211 views

Keeping a laptop power supply on without a laptop connected - any negative consequences?

Sometimes I unplug my Thinkpad laptop from its AC/DC power supply adapter and keep the adapter connected to the power socket. Are there any possible negative consequences? Some ideas I was thinking ...
0
votes
0answers
124 views

Laptop: Replaced/Tested all power components, still won't charge

I'm a computer technician, so please avoid the obvious diagnostic suggestions - info provided. I'm working on a Compaq Presario CQ40. Originally, the battery would not charge or run off ac adapter. ...
0
votes
0answers
115 views

How to test laptop adapter voltage with a Digital Voltage Detection Screwdriver Test Pen

Couple of days ago I replaced my laptop adapter, and when I use that, some amount of current discharges through the sockets,ports...etc (i.e. audio out). So I checked the adapter with a Test Pen (I ...
7
votes
2answers
3k views

laptop motherboard “shorts” when connected to adapter

Disclaimer: I'm sort of a noob, and this is a long post. Thank you all in advance! summary: completely dead laptop with no signs of life whatsoever (suddenly, for no apparent reason) Here's the ...
0
votes
1answer
54 views

AC adapter buzz

Yesterday my laptop was connected to an unsecure power source, and today I'm hearing a weird buzz coming from the AC adapter. It seems to fluctuate depending on the CPU usage :) Is it something bad? ...
3
votes
1answer
2k views

Is it safe to use a laptop AC adapter with 220V power if the AC cable is not rated for 220V?

The AC adapter supplied with my laptop is designed to accept voltage in the range of 100-240VAC at 50-60Hz, but the AC cable that plugs into the adapter unit itself is only rated to 125VAC 7.5A 2.5A. ...
2
votes
5answers
10k views

Laptop touchpad response badly when on power supply?

I have HP pavilion 2200 series laptop with AMD processor, 1GB RAM, on board nvidia display card. It suddenly cause following problem: When the adapter is unplugged, the touchpad works correctly and ...
0
votes
1answer
515 views

charging laptop with a different adapter charger [duplicate]

Possible Duplicate: charging laptop with a different manufacturer's charger I have lost this adapter, Output Voltage: 19V Output Current: 3.95A Input Voltage: 100-240V Wattage : 75W ...
1
vote
2answers
1k views

Will my new laptop AC power adapter work with my laptop, given these specs?

My laptop's AC adapter went out last night and I bought a replacement today, but will not be able to test it until tonight or tomorrow. My laptop is a Gateway P7801-U, but unfortunately Gateway does ...
3
votes
1answer
452 views

Is it safe to use a “Universal Laptop Adapter”?

I have seen a "Universal Laptop Adapter" sold in a computer shop before. I am thinking of getting one for a laptop. Is it safe to use? What differences are there between one of these and a typical ...
0
votes
4answers
11k views

How to test AC adapter?

I have a Toshiba laptop that is no longer receiving power when it's plugged in. How can I tell if problem is in the AC adapter or in the actual laptop? I could buy a replacement adapter (this is the ...
0
votes
2answers
1k views

Laptop battery holds charge, but won't charge any more

Ok, I'm sure I will need to replace either my battery or my AC adapter, but would rather not buy one if the other is the problem. My problem is. I have a Sager laptop that gets quite a bit of use. ...