Picture 1 This is a common problem with the Dell Inspiron 1501/E1705/6000 series. Most of the motherboards use the same general layout and design. You can tell by the white and silver cases used. From my guess, the solder on the leads of FL1 [filter] tend to lose contact after regular use. Perhaps eating away at the Filters pad, due to the current it is carrying. Sometimes it may be years before it finally lose contact, other times only months pass. In this instance the laptop was a couple of years old before it failed. How to fix it: Picture 2 Remove FL1 Clean contact area Replace FL1 Solder back onto clean surfaces. Click picture to see larger image Picture 2 Shows another failed NO Charge issue. FL1 cannot handel the surge when plugged in and eventually arcs then lose contact with the solder pad. In this case if you cannot find a replacement, you can simply turn the coil [FL1] upside-down, and make sure you have positive voltage on the circuit. Try to t
think you can resolder the memory gpu okok
ReplyDeleteThat was the tech before me. I wouldn't even consider soldering on a GPU.
ReplyDeleteObviously that tech had no idea what he was doing.
captain MF :hi mayo aim very interested in your posts am a technician and I love electronics since I was a kid its my hobby I would like to ask you about the Toshiba A305 power problem when it work on the battery but not on the dc-in iv tested all the mosfets and capacitors I thought its a problem in the quad ic ,that is in the power unit in front of the white fuse ,is that true ? or did you face this problem before? This is also a common
ReplyDeleteproblem in the dv9000 and dv6000 Intel versions I also tested the a/o4407 and the FDS6679 and also changed the max8734 and the max8743 and the result still the same no dc in power plz mayo will you help me in this ,on these models ( hp dv9000 /Toshiba a305) thatnks our leader ..regards
ben I repaired the lines on screen by simply resodage thermal memory of the card grapahique more hot air flap
ReplyDeletecaptain MF :hi mayo aim very interested in your posts am a technician and I love electronics since I was a kid its my hobby I would like to ask you about the Toshiba A305 power problem when it work on the battery but not on the dc-in iv tested all the mosfets and capacitors I thought its a problem in the quad ic ,that is in the power unit in front of the white fuse ,is that true ? or did you face this problem before? This is also a common
ReplyDeleteproblem in the dv9000 and dv6000 Intel versions I also tested the a/o4407 and the FDS6679 and also changed the max8734 and the max8743 and the result still the same no dc in power plz mayo will you help me in this ,on these models ( hp dv9000 /Toshiba a305) thatnks our leader ..regards
captain MF :hi mayo aim very interested in your posts am a technician and I love electronics since I was a kid its my hobby I would like to ask you about the Toshiba A305 power problem when it work on the battery but not on the dc-in iv tested all the mosfets and capacitors I thought its a problem in the quad ic ,that is in the power unit in front of the white fuse ,is that true ? or did you face this problem before? This is also a common
ReplyDeleteproblem in the dv9000 and dv6000 Intel versions I also tested the a/o4407 and the FDS6679 and also changed the max8734 and the max8743 and the result still the same no dc in power plz mayo will you help me in this ,on these models ( hp dv9000 /Toshiba a305) thatnks our leader ..regards
salut mohamed tu pour ton prob tu dois chercher un mosfet avec initial lm 9... 8 pied c est le responsable de demarage par ac ; tu trouve ce probleme chez hp nc.......
ReplyDeletethnx jack but what is its number ??? will u plz tell me the number of this mosfet that is responsible for ac
ReplyDeletesselon les constructeurs de la carte mere soit mosfet avec initial LM 9630 OU UN MOSFET DE TYPE ST C9--- ILS ONT LA PARTUCULARIRTE que chaque pin libre dans la catre mere
ReplyDeletehi mayo will u plz reply on my post about the toshiba 305 and hp dv6000 only power on battery problem.
ReplyDeleteThe DV series come in two types Intel and AMD. They are designed differently and have different problems.
ReplyDeleteSolutions are discovered by tests and diagnosis. There are many different reasons it will not come on. And I am not able to teach electronics via blog. Simply report.
Suggest that you check caps, and Mosfets for short condition.
mohammad faqih ; i think the problem for toshiba A305 is not enough power to startup machine. This power is backing up by array capacitor or one super capacitor (sometimes called proalidzer capacitor).
ReplyDeletemy solution is to change super capacitor (placed under processor socket),
or ...
you just add 2x330uF / 2,5V or 3x220uF / 2,5V .. parallel to bypass capacitor near CPU socket.
this always work fine for my jobs
Mohamad: What is the exact model number of the DV9000? Remember some are Intel, and some are AMD. So the parts would be different in the power in section.
ReplyDeleteMayo ; i have problem with Acer Aspire 2920z.
ReplyDeleteWhen i push power button, all indicator lamp (LED) is ok ... like working fine.
But there is nothing on display .. and so at external monitor .... there is nothing.
help me mayo, where is the problem in this laptop motherboard?
thanks a lot
Naph: First- all motherboards are not repairable. Some manufacturers don't use techniques that others use. ACER and HANNSTAR are different.
ReplyDeleteI have run into that problem on other Acer that use the same board features. But because the Intel GPU is not anchored (using high temp hotglue like the red or black glue on HannStar boards).
Reflowing will cause the chip to rise or become uneven. When the chip is not level, some solder balls do not make contact and then the board is unusable.
Recently I tried using a small guide made of aluminum on the edges, so that it will remain the same height off the motherboard. Then a weight (covering the center ceramic) added to the top of the of the GPU to keep it pressed down, before starting the reflow process. Too bad I did not measure the weight in grams or ounces.
----- ----
Also check to see if DVD and Hard drive initializes at startup. If it does, it is usually the GPU, if not it usually the South Bridge.
thanks mayo,
ReplyDeletei mean not motherboard, but component or chipset on that motherboard.
reflow process maybe cause uneven chip, but ...
how about chipset reballing ?
are this not usable to fix chipset (ball) problems?
mayo iam asking in general i dont have a specifik model for dv6000 and dv9000 but i worked on them many hours and iv noticed the location of deffect parts on these models(dv6000/dv9000) its beside the PCMCIA , the most power problems is happening there
ReplyDeleteive asked you about the toshiba a305 power problem ive also worked on it and i found the deffected IC and i will post its number ,thnx mayo
Naph: reballing would fix the GPU issue, but in the U.S.A. motherboards are cheaper than reballing.
ReplyDeleteMohamad: What chip number were you mentioning? MAX8734 or another.
motherboard are cheaper than reballing ? sure?
ReplyDeletein Indonesia, motherboard 2x-3x more expensive than reballing ... huff
i think Toshiba A305 not used maxim, but usually intersil like isl6262, isl6237 ...
hi mayo,yes naph toshiba uses isl and not maxim acually in the toshiba 305 some times it run on battery but it will not take power from dc in and this is from the quad isl.. ic that is located in the power unit beside the power jack on the board facing the white fuse as i can remember ,naph i would like to have your email adress if u have a hotmail account thnx in advance
ReplyDeletehi mohammad, i don't have hotmail account
ReplyDeletethis my account at gmail hanaphii@gmail.com
feel free to ask me, i hope i can help you more.
thanks mayo .. we are uses some spaces here to share :D
Just to confirm what Mayo said. Here in the US, purchasing a new motherboard is usually the cheaper option. Worse case, its about the same price so why not just replace it all together? Reballing is one of those things (especially with Xbox) that I just scratch my head with. I'm not sure why someone would spend that much money on reballing. Bear in mind, the shops that do it for $79.99 can't be doing it correctly.
ReplyDeletehi mayo i wana ask about the hp tx2500 it gives 1 bling at the caps lock as usual its cpu not functioning but ive changed the cpu and also reball the socket but still the same i have 3 of them and also a hp dv5 with the same issue what are the possible problems? and we are missing ur post also ...
ReplyDeleteI'll second that Mohamad.
ReplyDeleteIt was a busy week. A number of units came in and I was planning a short vacation. So I got behind on the posting. Then left the SD card with videos on them at the shop. The usual common fixes were just DC jacks on Acer and Gateway machines.
ReplyDeleteThese can be the bread and butter repairs, and had not done much troubleshooting because of the time it takes. Decided to take 'Melissa' my old dualcore desktop to the shop, since it can handle it. And that way I can post more often.
Mohamad: You have to be a little more specific about the model numbers. On the bottom of units they have more detailed numbers TX2715xx etc. Because some are Intel some are AMD. When a processor class is given, I can surmise from typical problems of that model. Such as Intel usually have bad/shorted caps. AMD is usually GPU issues. Especially if the GPU center is diagonal on the AMD unit.
ReplyDeleteAlso wondering why you went directly to REBALLING? It seems to be going to extreme instead of locating problem area during the diagnosis process?
ReplyDeleteI do have other projects I am working on. Like trying to come up with some sort of diagnosis card/adapter to tell me What area is Working, and what is not.
Here's a tip.
When starting the DV series, watch the lights on the front panel. If you have SATA/DVD light flash once or continuing. Look at the GPU for problem. This means that the P.O.S.T. process had started. If there is no indication of HD/DVD activity, it may indicate that it is a power issue.
If the HD/DVD light blinks, check LCD in a dim room check to see if the LCD is lit (but not displaying a image) then it is the GPU.
That's one of the ways that I figure out where I should be looking. There have been cases where the LCD backlight has gone out too. So have an external LCD to plug into the laptop also.
I hope you had a good Vacation Mayo, it has been very boring staring at your last post of a dead Dell graphics card, i have my gpu ready and waiting laid out on my bench like a patient awaiting a transplant.
ReplyDeletehi mayo th hp tx2500 is AMD based (hp pavillion tx2513cl )unit i reball the socket becouse the hp website says that a 1blink means that the cpu is not functioning in this unit nothing appears on the screen no boot at all just the 2 light blinking once (caps lock and scroll lock) its importtant to me to to know the problem more than fixing the unit is it possible to be the AMD GPU that has no cooler pad ??
ReplyDeleteMohamad: But that is a general diagnosis from HP "CPU Not Working" and rarely an exact cause, unless you are fortunate enough to get a true HP engineer (which don't exist) they are all made by Hann-Star in China. It could be the GPU or the BIOS also. Or simply no power to one of the control lines in the CPU. So always do the easy stuff first, and reball at the last resort.
ReplyDeletemichael: The vacation is this weekend, but will be sure to post the videos on YouTube so they can be linked from the blog.