If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
"Jonathan N. Little" wrote in message ... Adam wrote: "Johnny" wrote in message news:20151015144126.0ec76453@jmspc... On Thu, 15 Oct 2015 11:33:13 -0700 "Adam" wrote: System: ASUS N61JQ (laptop) Host OS: Ubuntu 12.04 LTS After a power outage yesterday, pressing the power button of ASUS laptop does nothing. The laptop was/is connected to an APC battery backup (surge protection only) outlet (via AC adapter). AC adapter's green light is "on". Any ideas? If you are lucky, there may be a fuse by the power jack inside the laptop. Thanks, do you mean the fuse may be blown and needs to be replaced? If so, this is new territory for me so let me see if I can find a DIY article. 1) Is the battery charged, Dell have a nice push button indicator on battery but I don't this Asus do. Thanks, if AC adapter is plugged in, does battery charged matter as much? Here's the ASUS N61JQ User Manual... http://www.lpmanual.com/manuals/asus/ASUS_N61Jq.pdf Doesn't seem like the ASUS N61JQ has a push button indicator on battery. 2) If battery good but doesn't do anything...keyboard lights etc then you may have fried motherboard I don't recall ever seeing lights (keyboard, etc.) when system is not powered "on". I hope nothing is fried. 3) If it boots with just the battery, but nothing with battery removed and just using the powercord/supply, then test power cord with meter. Not my case/scenario. If powercord/supply is good then your may have the input jack fuse blown. Not for the novice to fix. See images here of likely locations. Don't know yet. Need to make access first. Why me? :-) https://www.google.com/search?q=asus+laptop+fuse+on+motherboard&tbm=isch& tbo=u&source=univ&sa=X&ved=0CB0QsARqFQoTCOmgw5Wixc gCFYXXHgodKtIO4w&biw=1080&bih=859 We are talking about soldering on the motherboard... Soldering? No way. Not me. :-) -- Take care, Jonathan ------------------- LITTLE WORKS STUDIO http://www.LittleWorksStudio.com |
#12
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
On Thu, 15 Oct 2015 11:33:13 -0700, "Adam" Gave us:
System: ASUS N61JQ (laptop) Host OS: Ubuntu 12.04 LTS After a power outage yesterday, pressing the power button of ASUS laptop does nothing. The laptop was/is connected to an APC battery backup (surge protection only) outlet (via AC adapter). AC adapter's green light is "on". Any ideas? I did a simple google search... https://www.google.com/?gws_rd=ssl#q...er+requirement It yielded listings for where to get replacement 90W adapters, but scrolling down the page shows a lot of chatroom queries surrounding problems with this particular laptop and its batteries and power supply. It also lists the circumstances under which the failure modes are occurring. It would appear that the battery "watchdog" circuitry Asus incorporated into at least this model of their laptop line has some problems. A slight dip in the output of the power adapter or even too much ripple voltage presented by it when loaded may be what is going on. The new ones seemed to only be $12 to $15. It might cause less hair loss to simply get a new one. It is always nice to have backup power supplies in the "dongle" or "wallwart" realm anyway, since most are ultrasonically sealed and unserviceable. |
#13
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
Adam wrote:
System: ASUS N61JQ (laptop) Host OS: Ubuntu 12.04 LTS After a power outage yesterday, pressing the power button of ASUS laptop does nothing. The laptop was/is connected to an APC battery backup (surge protection only) outlet (via AC adapter). AC adapter's green light is "on". Any ideas? The attachments in this thread may help. "ASUS N61JQ won't start" http://www.badcaps.net/forum/showthread.php?t=42461 You need an account to access the attachments. The mainboard schematic is for a member of the same family, but might not be exactly the same as your mainboard. (The circuit may use different component values for 65W versus 90W designs.) The first MOSFET (one circled on a schematic page), is an inrush limiter. If the AC adapter is "hot" and then plugged into the barrel connector, a lot of current would flow for a short period of time. Instead, the inrush limiter gradually turns on the power, using an RC circuit tied to the gate. And the inrush limiter prevents the overcurrent inside the AC adapter from getting tripped. I don't see a fuse in that schematic. It's possible if a fuse is present, it sits in front of a clamp diode. If, somehow, reverse bias is applied to the barrel of the power connector, the clamp diode starts to conduct (protecting the motherboard). The fuse would be there, so the clamp diode doesn't burn out. Otherwise, the AC adapter has its own current limiting inside the adapter, so doesn't really need a fuse at the motherboard level. What I learned from that thread, is "look for burned stuff" :-) That's better than trying to decode that schematic... Paul |
#14
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
"DecadentLinuxUserNumeroUno" wrote in message ... On Thu, 15 Oct 2015 11:33:13 -0700, "Adam" Gave us: System: ASUS N61JQ (laptop) Host OS: Ubuntu 12.04 LTS After a power outage yesterday, pressing the power button of ASUS laptop does nothing. The laptop was/is connected to an APC battery backup (surge protection only) outlet (via AC adapter). AC adapter's green light is "on". Any ideas? I did a simple google search... https://www.google.com/?gws_rd=ssl#q...er+requirement It yielded listings for where to get replacement 90W adapters, but scrolling down the page shows a lot of chatroom queries surrounding problems with this particular laptop and its batteries and power supply. It also lists the circumstances under which the failure modes are occurring. It would appear that the battery "watchdog" circuitry Asus incorporated into at least this model of their laptop line has some problems. A slight dip in the output of the power adapter or even too much ripple voltage presented by it when loaded may be what is going on. The new ones seemed to only be $12 to $15. It might cause less hair loss to simply get a new one. It is always nice to have backup power supplies in the "dongle" or "wallwart" realm anyway, since most are ultrasonically sealed and unserviceable. Thanks, are you referring to the AC adapter or the battery pack? |
#15
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
"Paul" wrote in message ... Adam wrote: System: ASUS N61JQ (laptop) Host OS: Ubuntu 12.04 LTS After a power outage yesterday, pressing the power button of ASUS laptop does nothing. The laptop was/is connected to an APC battery backup (surge protection only) outlet (via AC adapter). AC adapter's green light is "on". Any ideas? The attachments in this thread may help. "ASUS N61JQ won't start" http://www.badcaps.net/forum/showthread.php?t=42461 Thanks (Guru Paul), that's such a cool website. You need an account to access the attachments. The mainboard schematic is for a member of the same family, but might not be exactly the same as your mainboard. (The circuit may use different component values for 65W versus 90W designs.) The first MOSFET (one circled on a schematic page), is an inrush limiter. If the AC adapter is "hot" and then If "hot" means to the touch, I just felt the ASUS AC adapter and it does not even feel warm. For comparison, I also felt my DELL AC adapter and it feels warm (but not hot). Both laptops are not powered "on". So, DecadentLinuxUserNumeroWhat (haha) may be onto something. Sorry, DecadentLinuxUserNumeroUno, I couldn't resist. :-) Where's the best chance of getting a compatible AC adapter? Fry's? Radio Shack? Other? plugged into the barrel connector, a lot of current would flow for a short period of time. Instead, the inrush limiter gradually turns on the power, using an RC circuit tied to the gate. And the inrush limiter prevents the overcurrent inside the AC adapter from getting tripped. I don't see a fuse in that schematic. It's possible if a fuse is present, it sits in front of a clamp diode. If, somehow, reverse bias is applied to the barrel of the power connector, the clamp diode starts to conduct (protecting the motherboard). The fuse would be there, so the clamp diode doesn't burn out. Otherwise, the AC adapter has its own current limiting inside the adapter, so doesn't really need a fuse at the motherboard level. What I learned from that thread, is "look for burned stuff" :-) That's better than trying to decode that schematic... Paul I haven't disassembled the laptop yet but nothing smells burnt. |
#16
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
On 2015-10-16, Adam wrote:
Where's the best chance of getting a compatible AC adapter? Fry's? Radio Shack? Other? ebay. -- Marek Novotny https://github.com/marek-novotny |
#17
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
"Marek Novotny" wrote in message ... On 2015-10-16, Adam wrote: Where's the best chance of getting a compatible AC adapter? Fry's? Radio Shack? Other? ebay. I had bad experience with eBay. Seller asked me to return an item (a video card) but did not give me a refund. -- Marek Novotny https://github.com/marek-novotny |
#18
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
On Fri, 16 Oct 2015 09:39:10 -0700
Marek Novotny wrote: On 2015-10-16, Adam wrote: Where's the best chance of getting a compatible AC adapter? Fry's? Radio Shack? Other? ebay. China. Seriously, sometimes it is ridiculously cheap and quick to shop directly (online) in China (Caveat Emptor). I got replacement batteries for my PengPod in less than a week for less than I would have paid locally /IF/ they had even been available, which they were not. Cybe R. Wizard -- Nice computers don't go down. Larry Niven, Steven Barnes "The Barsoom Project" |
#19
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
In comp.sys.laptops Cybe R. Wizard wrote:
On Fri, 16 Oct 2015 09:39:10 -0700 Marek Novotny wrote: On 2015-10-16, Adam wrote: Where's the best chance of getting a compatible AC adapter? Fry's? Radio Shack? Other? ebay. China. Seriously, sometimes it is ridiculously cheap and quick to shop directly (online) in China (Caveat Emptor). I got replacement batteries for my PengPod in less than a week for less than I would have paid locally /IF/ they had even been available, which they were not. Though it should be noted that you take your life into your hands with some of the cheap power supplies that come out of that country, not to mention the life of your equipment. Poor rectification, filtering, regulation etc. threaten your stuff, dirt cheap components and track spacing (distance between mains and low voltage parts on the circuit board) threaten your life if it picks the wrong time to go wrong. That said, if there's suspicion that the original ASUS power supply had issues as well, I'm not sure exactly what to recommend without looking into it deeper. -- __ __ #_ |\| | _# |
#20
|
|||
|
|||
cannot power "on" ASUS laptop after power outage
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
What is better, old-fashioned transformer or new-fangled "SWITCHINGAC TO DC POWER SUPPLY" | RayLopez99 | Homebuilt PC's | 7 | July 16th 12 01:30 PM |
3BTech.net Viotek "Black Titanium" Power Supply Ripoff | Kent_Diego[_2_] | Homebuilt PC's | 21 | May 21st 08 02:18 AM |
Toshiba Laptop suddenly "loses" wall power | [email protected] | General | 5 | March 13th 07 08:08 AM |
Turion 64, PowerNow! and registry "power policies". WinXPPro. | StarGaTe | AMD x86-64 Processors | 1 | July 26th 06 03:45 PM |
Power surge killed iiyama 18" TFT, any comments on Dell 20" offer | John Perry | UK Computer Vendors | 21 | January 12th 06 04:42 PM |