Hardware & Devices

Dead PC ... power supply problem ? [modified] Fixed....

19-Oct-09 2:32

DVI-I connectors/cables support both analog and digital inputs. This isn't your problem. What I think is hte issue is that your monitor is set to get input from the analog port not the hdmi port. Depending on your model there should either be a button to switch inputs directly or it's an option in the screen menus; unless you have a very cheap model it's probably the former. The button will cycle between the three inputs in sequence.

The latest nation. Procrastination.

Maximilien17-Oct-09 3:13

Maximilien

17-Oct-09 3:13

Good day,

My desktop PC's been dead for a few months now (I have a laptop as a replacement).

I decided that I should take some time to try to fix it.

When powering up the machine, nothing happens, the fan of the power supply does not even turn on, neither does the case fan that is directly plug into the power supply.

Question : are the fan controled by the motherboard ? i.e. if the MB is fried, should the fans (especially the power supply one) turn ?

Thanks.

Summary:
Got to a (good) store with the old PS, they checked it out, and was dead; no power at all...
Went home with a brand new PS unit, more wattage, cool looking cables; installed it, did not
blow fuses or mother board or graphic card...
Booted up Vista, spend a few hours updating updates (it's been dead for a couple of months)
Rebooted and spent the rest of the week-end playing Fallout 3.

This signature was proudly tested on animals.

modified on Monday, October 19, 2009 8:56 AM

Richard MacCutchan17-Oct-09 4:17

17-Oct-09 4:17

Maximilien wrote:
Question : are the fan controled by the motherboard ? i.e. if the MB is fried, should the fans (especially the power supply one) turn ?

I think that the power supply fan should always come on if there is power coming in through the mains. Are you sure you are getting power in to start with? Second thing to check is whether the power supply unit is passing current out to the MB and other components. Do you have an AVO meter, or a friend with one?

Luc Pattyn18-Oct-09 8:28

18-Oct-09 8:28

I would look for a fuse near the rear power switch, and check it.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? 59.24% waren verstandig genoeg om NEEN te stemmen; bye bye viaduct.

modified on Sunday, October 18, 2009 4:45 PM

Dan Neely19-Oct-09 2:32

19-Oct-09 2:32

IF the PSU is under warranty opening it to check for a fuse will void it.

The latest nation. Procrastination.

Luc Pattyn19-Oct-09 3:26

19-Oct-09 3:26

Overhere the fuse often is a user-serviceable part, with the fuse holder, power switch and inlet integrated in a single module[^].

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? 59.24% waren verstandig genoeg om NEEN te stemmen; bye bye viaduct.

Dan Neely19-Oct-09 4:00

19-Oct-09 4:00

That's odd; my two most recent PSU purchases had no user serviceable part/warranty void if opened stickers on them. The justification for the 100-240v 50-60hz (switchless) design I've seen has always been so that they could sell a single model globally; but if they're making your model with a user serviceable plug that's clearly not the case. Confused | :confused:

The latest nation. Procrastination.

Luc Pattyn19-Oct-09 4:35

19-Oct-09 4:35

all the user can (or is supposed to) do on the model shown is uncover the fuse holder and check/replace the fuse. This could/would still be a wide range power supply, that could be used everywhere provided it comes with a cable that fits your wall's power plug.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? 59.24% waren verstandig genoeg om NEEN te stemmen; bye bye viaduct.

Dan Neely19-Oct-09 5:26

19-Oct-09 5:26

My point was that the US models are being sold without a removable plug so we're still not getting the same one that you are.

My most recent PSU purchase[^]

The latest nation. Procrastination.

Luc Pattyn19-Oct-09 5:44

Reading CPU Fan Speed from the BIOS

19-Oct-09 5:44

Yes, that is what I expected: they design and build PCs that are "universal" and could work mostly everywhere by solving the cord/plug issue; and then have a few variants to best fit the local market.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? 59.24% waren verstandig genoeg om NEEN te stemmen; bye bye viaduct.

BIJU Manjeri12-Oct-09 23:56

BIJU Manjeri

12-Oct-09 23:56

Hi,
I'm in a very difficult situation. Frown | :(

I want to read the CPU Fan speed from the machine running Windows OS.
WMI provides Win32_Fan class for doing this. But as far as i know, its is not implemented by Microsoft.
(i think so !!)
googling doesn't help me much.

But i saw the CPU Fan speed value on the BIOS > Hardware Monitor > CPU Fan speed/System Fan Speed. Its a read only value.
So, i think it is possible to read that value from BIOS. But i don't know how.

Please help me

Thanks is advance
BIJU

Richard MacCutchan13-Oct-09 0:46

13-Oct-09 0:46

BIJU Manjeri wrote:
googling doesn't help me much.

Did you try this[^]?

Luc Pattyn13-Oct-09 3:36

13-Oct-09 3:36

Hi,

The available hardware information is limited to what the vendors provide. WMI gives a framework to access what is available.

Here is what one of my systems returns for Win32_fan, there is no speed info:

1: ActiveCooling = "True"
1: Availability = "3"
1: Caption = "Cooling Device"
1: CreationClassName = "Win32_Fan"
1: Description = "Cooling Device"
1: DeviceID = "root\cimv2 0"
1: Name = "Cooling Device"
1: Status = "OK"
1: StatusInfo = "2"
1: SystemCreationClassName = "Win32_ComputerSystem"
1: SystemName = "LP1720"

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? Neen!

Dave Kreskowiak13-Oct-09 4:46

Dave Kreskowiak

13-Oct-09 4:46

It IS implemented by Microsoft. That's why you even have the class in the first place. The problem is that the Fan class does not provide the speed information. You would have known this if you read the documentation on the Win32_Fan class.

There is no Microsoft-supplied class that returns CPU speed. This would be provided by the manufacturer of the motherboard, IF AT ALL! You'd look in a different namespace with the WMI class for one of these, not in root\CIMV2.

For example, on my HP desktop machine, the namespace to find the HP supplied class for fan speed is in root\HP\InstrumentedBIOS. The full class path is HP_BIOSSensor\HP_BIOSNumericSensor\HPBIOS_BIOSNumericSensor. The machine I'm on supplies 4 instances of the HPBIOS_BIOSNumericSensor class. The first instance returns the CPU fan speed, the second is the chassis fan speed, the third is the CPU temp, and the forth is chassis ambient temp. These values are not returned at normal temperature and speed values, but values on a mapped scale. Since there is no documentation on these scales (that I can find right now), I'd have to do some research into what those values scale to and what they really mean.

Not all motherboard manufacturers supply this kind of information through WMI. In fact, most do not.

Oh! Where did I get this information?? It wasn't with Google or some mystical oracle. I used this little tool[^]. It's a MUST HAVE for doing WMI work.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008
But no longer in 2009...

BIJU Manjeri13-Oct-09 17:57

BIJU Manjeri

13-Oct-09 17:57

Thank you Dave..
Thanks for your reply..

Dan Neely13-Oct-09 5:52

Did I kill my wireless router?

13-Oct-09 5:52

Adding to what Dave's said, fan speed, temperature, and voltage monitoring locations, etc vary widely between mobo models when they're supported at all. As a result hardware monitoring tools that report these things either issue new versions at a breakneck pace to support new hardware or provide an online DB of some sort that their app can query to get the parameters.

It would be nice if MS would define standard location/format/etc data for those parameters for a future revision of WMI; but since Weven is RTM; in the best case we'd need to wait until SP1; probably until Weight. Then add the amount of time it takes the mobo vendors to update the necessary drivers.

The latest nation. Procrastination.

puromtec112-Oct-09 16:51

puromtec1

12-Oct-09 16:51

So, my home linksys router does not show up on laptop's list of wireless networks anymore. I can connect using ethernet cable, still.

Just this afternoon it was fine. Then it looks like it quit right after an episode where the power plug became loose from the surge protector. Struggling to reach the power cables on the surge protector, I fiddled with the plug to get it to make a good "seating" in the outlet. I noticed the wireless router powering on then off, repeatedly, as I was fighting to get it in the outlet. So, in quick succession, the router was powered on and off about 5 or 6 times, maybe.

Next thing i know it, my wireless cannot be found. I can see my neighbors still.

Can anyone tell me if it likely got toasted?

Richard MacCutchan12-Oct-09 22:47

12-Oct-09 22:47

puromtec1 wrote:
I can connect using ethernet cable, still.

Since you can connect to the router you should be able to login and check the status of all components. Do you get anything in the event logs?

puromtec113-Oct-09 17:38

puromtec1

13-Oct-09 17:38

Unbelievable. For some reason, by flipping the power so many times, the whole thing reset to factory defaults. Therefore, the router showed up as 'linksys' with no security and then looked like some neighbor without a clue, but that was me who was without one.

Thanks.

Richard MacCutchan14-Oct-09 2:24

14-Oct-09 2:24

puromtec1 wrote:
some neighbor without a clue, but that was me who was without one.

We've all been there, many times Mad | :mad:

Luc Pattyn13-Oct-09 4:31

13-Oct-09 4:31

Does it have an external power adapter? if so, the adapter or the router (or less likely both) may be fried.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Local announcement (Antwerp region): Lange Wapper? Neen!