Dell Latitude E7450 - No power, board repair
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- čas přidán 13. 06. 2019
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Even a non-repair of a no fault or a no fix because of damage beyond repair that isn't cost effective is a valuable learning experience. Watching you go through the process of eliminating possible faults is a learning experience you can't learn in books or even in a school teaching electronics. Give me this type of learning and I will do it all day long. Going to a physical school can teach you electronics but it does nothing to teach repairs in real world scenarios. Keep teaching and we all we keep learning. Thank you so much for going through the painful process of teaching. We all know you don't have to do this but I for one appreciate what you have to offer. Thank you again.
Actually, everyone has what interest him/her in watching the videos of this man. For me, what interest me and make me happy most is the way he always go about the troubleshooting thing, it set me laughing sometimes menh😁😁. Who else could imagine that…
Dude you are a genius, not to mention the (patience of Job). Just seeing you do your job slowly, calmly and patiently makes me wanna continue watching lol. When you stop to say "hmmmm I don't know what's wrong" has me also stopping to think and concentrate too. Its exactly like the saying 'laughter is contagious' lol.
Wow, you do have patience dismantling this laptop. If it was in my hands I'll probably be fling 3 floors under, through the window, before getting repaired. Everything seems odd in this laptop, from the weird board design to the amount of screws they put in. Congratulations on another job well done.
This is Dell. The are not greedy on screws, and uses the same size screws whenever possible :) And Dells are usually workhorses, not the fashionable accessory.
Your videos are always extremely informative, interesting and very helpful. Keep up the good work, I enjoy it very much.
Thanks Sorin .Have a great weekend . : - )
Congratulations on another job well done.
Thanks for the petrol trick. I learned something important today!
My choice is alcohol instead of petrol, by inhaling you only get drunk instead of cancer! :D
i second Muthanna Tech, a special day for caps..thank sorin for the very nice tutorial
thank you Mr.Electronics repair school
Salut Sorin interesant o sa urmăresc toate postarile.
Well done, master. Nothing more to add actually.
Once again, the circuit warrior has triumphed. Thank you for repairing live, sharing experience. Greetings from Argentina, South America.
You are an inspiration.
Thanks for your videos 👍
Imo you are the best technician on the net.👍👍👍
it helped me with a dell. tnx!
finally ... i was able to watch Sorin actually "replace" a capacitor ..... 😁
dont get me wrong i totally agree with him ... most times there are enough on the lines to compensate ... for removal of one or two
i think i know why Sorin replaced the cap here .... i think because of the design difference ... and the input being like a power supply .. instead of the two serial mosfets .... he thought the cap bank may be the capacitor of the switching power supply after the coil ..... and it would be wise to replace it in that case .... 😊
I love your video because I understand every single word too my English skills is not high so your explained is very good keep going
@@voornaamachternaam3502 no his English is very simple to the people they mother language is not English
@@voornaamachternaam3502 what is you'r mother language
@@voornaamachternaam3502 no it's because if your mother langue is English you will find that is absurd and will not be well understood by its accent
but if your mother language is not English you will understand what I'm mean
Nice one. Thanks.
Dear Sorin, you definitely deserve a thermal videocamera . Thumbs up if you agree 👍🏻🤝🏻🇳🇱
great job thanks sir for repair this
Thank you for the nice video
thanks ...i have repaired my laptop by your guidance in video ......thanks
I also replaced a capacitor on a e7450 but in my case the defective one was the one closest to PQ700
May be it’s a short cap.day Sorin haha
Thank you for the nice video
Another nice job.
thanks Sorin
Hi Sorin, great video as usual! I'd like to ask you a question, though:) I'm wondering if those test probes you use with your multimeter were curved that way or maybe you modified them? I was looking for similar ones, just like yours, with curved needles but haven't found anything. I'd really appreciate if you could tell me if maybe I could buy such curved leads or I'd have to modify straight needle ones. Thanks and keep up the good work, cheers.
great job
Before watching, shorted 19v zener diode on the 19v or a cap
Lets see if im right
Appears to be some sort of serial flaw, ceramic caps would only break through and shortcut with a massive over-voltage, not just a temporary peak, maybe they took caps with 16V instead of 25V breakthrough voltage during manufacturing process by "mistake"? In that case, replacing all ceramic caps of same type on 19V should be advisable.
If the clips breaking what do you do? Hmm now? It’s a nice laptop.hot glue? Or buy a new part?
It’s a triller watching you open the laptop clips always thinking something have to break. You are the best nice find every time
Thank you have a nice weekend
Oh NOOO!! I have this exact problem on my e7450 that just appeared today while i was using my laptop. I really don’t know what to do. I dont have the skillset to repair like you did.
It was one of the first 3 caps you tested before removing the MB. I wonder if they are near a port where they are plugging in a bad device.
Needs another stick of ram - have a great weekend also
Why replace the capacitor?
nice. enjoy weekend.
we bought 20 7450 in our company. after 16 months they all got broken :)) they all had problems but not the same problem :)) some of them had problems with charging circuit, others gave blue screens random, others had problems with lan others with wireless :))) other with mobo.... we will never buy laptops from dell. (greetings from Romania :) )
@@Leshic2 yep, it's very strange but...it happened :(
Good video
Do you have the schematic por this model ?
Sorin s going to have dell laptop nightmares now lmfao.
Mr. Sorin, do you have a technique for remembering which type of screw goes where? ...I am always fascinated by how you seem to manage by putting them all in one big pile!
he doesnt remember as well, he just try random screw to fit
NOT only that but their is only 3 or 4 different size screws and by every screw hole, they list size... ex. 2.5×5 or 2.5×3 ect
@@TheBaregel he doesn’t remember to put all the screws back as if you watch closely he miss replacing one under keyboard AND one above keyboard , then there’s the problem of the final two screws !
Is there a infra red heat vision camera you can get, so can see components heating up when applying current? Was wondering.
I have a E7450 with similar issue.The Mosfet on PQ700 is getting hot too but the caps on the other side of the board become hot too.. I can't identifie which of the caps is the one. They get hot when you apply 10V 3A but it looks like they were it all three together. So I removed all 3 caps and still got the short on the board.
I have a Dell Latitude E7240 which powers on but no display and no hdmi output, when I plug the charger in the system boots up without display:
- Power button led comes on
- Hard drive led flashes once very quickly
- Battery led comes on for one second
- After 4 seconds the power button led goes off
- After another 4 seconds the power button led comes back on and stays on, the hard drive led flashes once very quickly
The green leds on the actual msata SSD light up
If I leave the system in this state then the cpu and heatsinks get hot and eventually the fans will spin (but still no display)
Pressing the power button once will turn off the system (cpu will cool down, msata leds will turn off)
I’ve tried the following:
- Performed hard reset / static discharge, disconnected and checked cmos battery (3v on multimeter)
- Replaced RAM, msata, screen with known working
- Tried booting while holding down ESC, D, FN keys
- Tried HDMI output (no output)
I’d really appreciate any other suggestions / tips, could it be a corrupt bios? Thanks in advance
Yay! More senpai Sorin videos!
Maybe the owner has a nasty 19v psu thats spiking every laptop the owner uses it on?.
Thank you Sorin. But Once more, how do you decide on the replacement cap? by shape and color or ...?
@@Leshic2 true ... mostly they are filter capacitors and therefore ... not critical in exact value ... most caps should be interchangable ...
Hie Sorin ,
I have a question ,in a situation where you don't have a power supply like yours is It possible to use a 5v/2A fon charger to find out which component is shorted to ground?
What a nightmare of screws !! :-)
I have e7450 i7. Laptop works fine for 1 to 2 hours then freezes. Sometimes pressing on motherboard un freeze but for some time as long as i keep pressing. It could be dry solder or something else but i don't know exactly from where to start.
(ok, dadz not ok. dadz verd!) I love your videos mate
Hi Sir , thanks for the video , could you please show me in the board where is the position of PU111 , thanks .
Insane laptop design, tons of screws expecially for holding the motherboard...
I thought the same thing. Totally overkill.
Hola tenes el esquematico de ZBU11 LA A963P Schematic Dell Latitude E7450
Hello Sir :)
What is that part called? I am experiencing the same issue and want to find the correct item type.
👍
idol,i have same model but no power...can you share the schematics?
hello sir , what about a buzzin noise when i unplug the battery but no power on even when i plug it no power on but the buzzin noise disappear
I have a question about my laptop.
All of USB ports is not working. And when charger plug in sometimes screen going to off. Or the laptop is reboot. And the led indicator is not working properly .
My laptop is dell inspiron 3558.
Thank you so much.
How do you measure the current in a closed circuit?
And in 31:38 you removed the defect middle cap but in 33:35 you replaced the last one , why?
because it was easier, or he accidentally knocked off the end one while trying to solder to the middle. he just shuffled them around, the position doesn't matter at all because they are all in parallel and are sort of interchangeable even if they weren't
Good morning friend, could you provide the electrical diagram of this board there, or could you tell me what the capacitance and working voltage of this capacitor is, could you also tell me what the inductance of the pl3 is?
We replaced the mainboard capacitor for one of these and it only worked for one day, stopped turning on again after that....
My company only orders from Dell and these Dell laptops are so prone to short-circuit. I have 4 turned in by different customers using different Dell models. I can't seem to find a local repairer who works on mobos. They all tell me I need to buy a new motherboard and replace it. They're not skilled on finding the bad cap and replacing it.
Great video, but please help me fix an issue with laptop over heat and blue screen.
Salut. Atelierul e in Romania sau in străinătate? Mulțumesc.
👏👏👏👏👏👏👏
what fluid did you use sir to test the shorted capacitor?
Alcohol or lighter fluid
Sorin, you are in V mode and not Ohm mode.
in diode mode .
Just think I see you're working with your left hand
Hello there what is the black cable attached to usb?
he had attached the ground pin of power supply to the metal of the usb ...
Basic thermal camera is like 100 quid it would save you some time in finding short....
Basic thermal camera is useless!
He also likes the smell of zippofuel!
have u found a good one for few bucks?
thermal camera is for boy
Sir
I have a dell xps 13 9365 2 in 1 it stucks on
Dell logo
Can you help please
Try taking out the ssd and see it it goes through to BIOS - if so the drive is dead and makes POST hang
I doesn't enter in bios even if I press F2
Wow that thing has more screws than a hardware store. Hope you got paid good for that job.
What is the liquid you use to find hot spots???
Isopropyl alcohol
I have that same machine, the crazy thing is that it turns on when it wants, you turn it on, it turns off marking the hard disk LED ... has it happened to someone? 😭
Reprogram bios
1st time replacement of a cap😵😀😀
service quality is improving , not so long ago that mb will return to its owner with empty pads or 0.1mm jump wire :)
h .. i watch your tuts..
i have Dell latitude 6430 , it has weird issue ... it not power On when power button button is pressed .. only light appears on power button and turn off after 2 deconds.. but smoetime it power on norlamlly and work with no issue but if hutdown no one knows ,will it power o again or not ..
You don't have a capacitor issue but it may come from the super I/O chip which is shutting down the pc after doing the verifications of the critical components. When it detects a faulty component like the graphic ship, it shut the pc after (2 seconds). If your pc is getting hot, it is definitely that. The overheat problem is due to dust and obstructed openings on the back of the pc which result in damaging the graphic ship over times.
@@GeekBii its laptop and no heating issue i notice only power on issue
Please, what is the capacity and voltage of the capacitor?
So,,, what´s going on? you took out the middle cap and then you changed? To the first one?
he's concerned with aesthetics, that unknown little 0805 cap looks better at the bottom of the row from the 1206 big ones ;)
i am trying to find bios chip if you could help please
The value of the Capacitor? in the time 30:55 ???
Guys, what is the value of the capacitors? 22uF ?
I am older than you but I want you to adopt me.
I want you to be my father.
The father I never had..
Oh, is that the time?
Don't tell me i've been up three days straight?
All right.
Scrub that.
I'm gonna go get some shut-eye...
>
Cum gasesc lichidul in ROMANIA?
Boss, I have a problem with my HP EliteBook8570p it will power on, but it will not display on the screen, I have to try to change the memory and the processor , please i need you help Boss
Sir sem laptop hai power on and no display
Don't hand over the phone/tablet etc until they have paid :)
Yessssss
Dell inspiron 1525 laptop fault is not charging plug in charger battery replaced new what I m do
SIR DO YOU HAVE DIAGRAM OF DELL LATITUDE 5530 I5 12th gen thanks
please share to me a scematic or boardnview..please ser
Touchpad and keyboard not working how to fix
You should really invest in an infrared camera!
i have same one and it wasnt that it still dead shorts just more junk from dell ill stick with hp from now on
actually mine was the same what happens if you leave them out?
its working fine with it removed
must be very common on e7450 exact same issue same spot
Hello engineer I want you whisper me please if you can
I like to buy just ike ur watch sent me link
pro Subscribe 1pg
make short time videos
Congratulations on another job well done.