High pitched noise from AC Adapter

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spune · #1 Post by **spune** » Tue Jul 31, 2007 5:12 pm

It seems like there are a lot of people who are experiencing this problem. I just received my ThinkPad X61s and also have the same problem. I called IBM Support (1-800-426-7378) and they'll gladly send me a new AC Adapter tomorrow.

For those of you who requested a new AC Adapter, did it fix this issue?

Jackboot · #2 Post by **Jackboot** » Tue Jul 31, 2007 5:49 pm

I will have my new adapter tomorrow.

scrawledinwax · #3 Post by **scrawledinwax** » Tue Jul 31, 2007 10:58 pm

I got my new one today (after calling on Sunday) and it's totally silent. I think there was a bad batch of new ones - the original was a 'Revision E' and the new one they sent was a 'Revision D'

patch · #4 Post by **patch** » Tue Jul 31, 2007 11:02 pm

Mine too makes noise. Will have to call lenovo tomorrow. What did the conversation go like?

spune · #5 Post by **spune** » Wed Aug 01, 2007 12:14 am

patch wrote:Mine too makes noise. Will have to call lenovo tomorrow. What did the conversation go like?

I just told the CSR I received my ThinkPad today and I noticed a high pitched noise produced by the AC Adapter. Then he said he'll ship a new one out tomorrow. Nothing else was said.

#6 Post by **tomh009** » Thu Aug 02, 2007 2:39 pm

Same here. "Would you like a replacement AC Adapter?" Why, yes, I sure would!

Jackboot · #7 Post by **Jackboot** » Thu Aug 02, 2007 3:52 pm

My new AC adapter (revision D) no longer squeels like a pig.

Lenovo is not requiring to send the old/squeeling (revision E) adapter back to them.

thaug · #8 Post by **thaug** » Fri Aug 03, 2007 7:14 am

I submitted a request online through the ESC+, and they quickly approved a replacement. I guess since a lot of people are calling about this problem they are just replacing them no questions asked.

jamess · #9 Post by **jamess** » Fri Aug 03, 2007 11:18 am

I had the same problem with my X60s adapter, but only to learn later that it was not the adapter but rather strange power supply in the house - there were big voltage drops and everytime that happened, the adapter made high pitch noise. I now have two good adapters

spune · #10 Post by **spune** » Fri Aug 03, 2007 1:32 pm

Jackboot wrote:My new AC adapter (revision D) no longer squeels like a pig.

Lenovo is not requiring to send the old/squeeling (revision E) adapter back to them.

They sent me the more expensive 90W power adapter. Although it's slightly larger and heavier than the older 65W one.

Jackboot · #11 Post by **Jackboot** » Fri Aug 03, 2007 1:39 pm

spune wrote:
Jackboot wrote:My new AC adapter (revision D) no longer squeels like a pig.

Lenovo is not requiring to send the old/squeeling (revision E) adapter back to them.
They sent me the more expensive 90W power adapter. Although it's slightly larger and heavier than the older 65W one.

I wouldn't be too happy about that. I'd ask for the smaller 65W adapter. There is no advantage to a 90W adapter and it is bigger and heavier - not something I want to travel with. Kind of defeats the purpose of an ultraportable notebook if the adapter is huge.

spune · #12 Post by **spune** » Fri Aug 03, 2007 3:25 pm

Jackboot wrote:
spune wrote: They sent me the more expensive 90W power adapter. Although it's slightly larger and heavier than the older 65W one.
I wouldn't be too happy about that. I'd ask for the smaller 65W adapter. There is no advantage to a 90W adapter and it is bigger and heavier - not something I want to travel with. Kind of defeats the purpose of an ultraportable notebook if the adapter is huge.

Doesn't the 90W charge faster?

Jackboot · #13 Post by **Jackboot** » Fri Aug 03, 2007 5:02 pm

spune wrote:Doesn't the 90W charge faster?

Surprisingly, NO!

The battery is limited to be able to accept a certain rate of charge. This max charge rate is provided by the 65W adapter so the 90W adapter has no advantage...for the X60s at least.

A more power-hungry machine (like a T-series) can get use out of a 90W adapter since you can max out the battery charge rate (around 30W I think) while the notebook is using another 35W+.

spune · #14 Post by **spune** » Fri Aug 03, 2007 5:29 pm

Jackboot wrote:
spune wrote:Doesn't the 90W charge faster?
Surprisingly, NO!

The battery is limited to be able to accept a certain rate of charge. This max charge rate is provided by the 65W adapter so the 90W adapter has no advantage...for the X60s at least.

A more power-hungry machine (like a T-series) can get use out of a 90W adapter since you can max out the battery charge rate (around 30W I think) while the notebook is using another 35W+.

I just called up IBM and they will be sending me the 65W model. However, it's currently out of stock so I'm not sure how long I'll have to wait.

roblim · #15 Post by **roblim** » Fri Aug 03, 2007 7:21 pm

Just called. Backordered for my x61s. The rep said 5-7 days until they can ship one to me.

High pitched noise from AC Adapter

High pitched noise from AC Adapter

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