Two suggestions: 1. Pause the video at 26:42, upper left, that looks like a broken trace right above the silkscreen for '3'; and 2) use your Rigol oscilloscope to measure if that crystal, X1, that you replaced is being excited by the microcontroller. Some LCDs, either go all white/clear or all black when no valid video is presented to them. There is a slight possibility that that much current sunk through the pins of that microcontroller has damaged it. With no clock, that Microcontroller can't initialize or execute its firmware.

@frankcarpenetti5776

Жыл бұрын

I agree, I have not yet encountered a faulty crystal as of yet, those microcontrollers can really confuse a person from my experience, especially with no schematic or firmware availability? I would let this one go Alex?

@worroSfOretsevraH

Жыл бұрын

How do you explain the chime? Button press tunes?

@zaprodk

Жыл бұрын

@@worroSfOretsevraH Exactly. The oscillator is working, otherwise there would be NO signs of life. So the oscillator is good!

@ErickBuildsStuff

Жыл бұрын

At 9:11 one of the pins of crystal oscillator is broken off on donor board. Your explanation combined with this might be the probable cause.

@zaprodk

Жыл бұрын

@@ErickBuildsStuff No, it is working just fine. The LED backlight is dimming just fine up and down during boot. Without the crystal oscillator running, the MCU wouldn't run code/boot.

@9:11 Pin no. 2 of DCP1505 is broken on donor board. Silk screen says ox1, so I think it is clock oscillator. It connects to microcontroller next to it

@ekremovzet

Жыл бұрын

THAT'S IT !!! Well noticed

@-Primer-

Жыл бұрын

Looks like that DCP1505 connects to VSS and OSC1/CLKIN/RC12 of the dsPIC33FJ256MC710 Microchip Digital Signal Controller. Page 9 of the "dsPIC33FJXXXMCX06/X08/X10" Data Sheet

Always appreciate the no-fix videos, the amount of care Alex puts into things that come in so poor such as this shows how much he wants to help every single customer.

@shinokami007

Жыл бұрын

we learn from our mistakes and failures ;)

9:12 you lost One leg of the donor Part

@pandrosik

Жыл бұрын

It did look that way.

@chihofung6860

Жыл бұрын

That component appears to be a resonator, which provides clocks to the microcontroller. The leg (the upper left?) might be actually the solder but Alex may check the soldered component for the possibly detached leg.

@chireaionut8473

Жыл бұрын

he did lost a leg there ... that is not solder...

@zaprodk

Жыл бұрын

@@chireaionut8473 No he didn't. The pins are attached like on a QFN-package. The don't just fall off like BGA-pads.

I am a EE by schooling but sit and watch these and your knowledge and skills with amazement. I could not do what you do. I can always feel your frustration at the end of a video when you sigh and say tell me what you think.

Thumbs up for anyone who enjoyed the video even though it was a no / partial fix , good job Alex , you did your best and we can tell from behind our screens , you can't fake such thing 🙂

@alank616

Жыл бұрын

Yes we need to appreciate Alex's videos, there's always a chance to learn more from each video 🇦🇺

Your meticulous trouble shooting skills are impeccable. I learn every time I watch. Thank you.

Please check the screen connector pin again 20-21 from right

Am I the only one concerned about Alex no longer mentioning the 9’th dimension? Maybe he found it and will now have spare parts for all eternity 😅

@igrewold

Жыл бұрын

man you reminded me of the old days esp TVs when manufacturers used to have test points numbered on board And the device had schematics, manuals, parts easy to replace, chips DIP, everything was piece of cake now I don't even know what this device does, maybe it reads OBD II data from car computer(uC/uP) then change certain values I think the 5th dimension reachable in a nonlinear algebriac way, had there been schematics, firmware, all the works

@tvuser1

Жыл бұрын

He mentioned it on the last video i believe.

@lolsypussy

Жыл бұрын

has moved to the 10th

@mrBDeye

Жыл бұрын

It is mentioned when a part flies off the board or tweezers.

@fuzzymcuppets6167

Жыл бұрын

Alex has seen all the horrors there is to see in the 9th dimension and returned to tell us about it....

Hi, I think the hot part is xtall. The heating of this part may indicate a malfunction in the microcontroller. The backlight works because the dc-dc converter circuit and the LDO regulator can generate voltage.

Maybe it is an idea to compare the traces that go to the pins of the connector, with those of the donor board. Maybe not all the pins (where there is no pad) are not a no connect. I.e. because it would have to go to the other side of the board, or what not. Or maybe there is a discontinuity between one of the pads and the tracks, because that old connector was really a Hiroshima.

@AndreaPizzatoYT

Жыл бұрын

Or the customer trying to resolder the connector has cooked the big chips on the other side of the board

@sonjakavalut

Жыл бұрын

​@@thomasandrews9355 Only body death is definitely...

@norfolkngood8960

Жыл бұрын

@@sonjakavalut not true😉

Alex is working on a repair. Class is in session.

Greetings. It is always a great pleasure watching you and listening to you as you perform the miracle carrying out your work with the precision of an orthopedic surgeon. I also enjoy the fact that your videos are interwoven with little historical snippets and jokes like "charging $100.00 for each second of guess work." It is absolutely brilliant.

We can't always win. I appreciate you sharing the video anyway. Troubleshooting can be tedious and time-consuming, especially when you don't have the schematic for the part you're working on.

Wonderful way to find the problem :D

Awesome work

Well done Sir

Good work 💪 👏

Looking forward to part II. Thanks for the video.

That was some crazy good soldering.. Awesome job..

Very impressive Alex

Solid, just like the repair man. 😎

customer sends you lego, means they couldnt figure it out themselves

I just watched the show (Analyze This) and I see where you got the phrase (Your the Boss of all Bosses) they say it in the show. It caught me off guard when I heard it as I watch all your youtube videos and you say it almost every time. So keep calling him the Boss of all Bosses. Your stream makes be want to be a tech repairmen. You make most of us think positive about the word. You Can Do It.

At 17:12, I was yelling at the screen, "bent pin on the replacement connector, #20 from the right". 🤣

The ninth dimension is in my shop. I took a tiny screw off the back of an HP Envy laptop and poof it was gone. I looked all over the bench, I couldn't find it. I took the 2nd screw off and it too just disappeared from the tip of my magnetic screwdriver. They were both stuck to the chassis about 2 inches away on the underside (so I didn't see them). I guess it has a powerful unshielded magnet for the speakers on this laptop. After the repair was done It was fun trying to get them back in. As soon as I approached the laptop with the screw perched on the end of the screwdriver it would whisk the screw away like a magic trick. I had to hold it on there with my finger. =)

@norfolkngood8960

Жыл бұрын

It was abducted by an army of odd socks who worship an idol made of belly button fluff

The screens are not good because there are filters on its ribbon cable that are soldered to the wrong position by default. At least in my cases when I ordered those screens. I have a cheap mini pocket oscilloscope that uses the same screen and I drop it(and break it) all the time.

wow thats is a work of art!

This is truly amazing seeing him do this wish I had the patience 😅😅😅

@timeskipf

Жыл бұрын

Its not about the patience it justs makes you more motivated to solve the puzzle

Now that is something to enjoy - send Alex what is really an electronics kit and ask him to "repair" it! 😂

I messed about with something similar and hit a dead end with it. I returned it back and it turned out a couple of pins inside the HDMI port were shorted. So I took it back in replaced the port and it worked. When probing the board for shorts I missed it. Possibly as port traces directly back to processor data lines. I guess sometimes the simple things are missed if one is focused hard on the issue, the more time invested into such a fix then down the hole we go. Still a 👍 from me. ✌️👍

you missed soldering pin number 4 from left - check video 15:34. Great work Alex الله يحفظك

Tanks for vidéo French tv ❤❤❤❤

Awesome trick there with the alcohol to see what's hot. Never seen that one before! 🤯

I'm going to have to get a couple rolls of your solder wick. The stuff we use at work just frays into an absolute mess. You can see the stuff you are using is a much tighter weave and would clearly work much better.

Nice❤

that solder transfer was amazing

I love your videos man win or lose

Might it be quicker to fix the "donor board?"

thank u Alex.

Eager to know the fault for white screen. Waiting to see Part - 2 soon.

21:02 thanks goodness i thought you were going to ignore it

I would compare the oem screens with the aftermarket screens and look for differences under the scope and you could maybe make them work.......

@volvo09

Жыл бұрын

The broken screen was still white, even though it was cracked it didn't look like it was being sent an image.

@vettepicking

Жыл бұрын

@volvo09 he said all past units had white screens with the aftermarket screens, then worked perfect with a oem screen. Im not referring to this unit in particular

@Auburn7543

Жыл бұрын

@vettepicking The first screen I believe (the broken one) is the OEM . It was white also except where broken in the center

@vettepicking

Жыл бұрын

@Auburn7543 not what im talkin about...

Came in for repair.

i think the first component you took of the donor board one off the pads came off the component and was still on the donor board

Awesome

Awesome ✌🏻✌🏻✌🏻

When I used to repair barcode scanning phones at my old job, sometimes the screens we had to place into them didn't work (they turned white like these Mini Maxx Tuners) until we flashed an updated firmware on the board because the screens themselves were "newer" than what the board had programmed into it. Do you think there is a way to flash the Mini Maxx board via an app on your computer? (We updated the Android phones via an ADP connection to our computers and afterwards the screens would work)

Good luck i hope you find the problem 🙏

does'nt have a polarized layer over original does it? once changed lcd in a fire hd or something and it displayed white without polarized layer

The plot thickens. Looking forward to part 2.

although they are no connect ,in 17.23 when you took of replacement connector it showed them being connected somewhere?

I think that the dsPIC33FJ256 chip that the "XO1 DSP 1505 oscillator that was short" drives is faulty. No data the getting to the screen from the processor

I wonder if trying to swap the flash chip with the FW on it from another donor board is worth a try. It's possible it got fried or corrupted somehow and that is what is preventing the unit from starting up.

9:48 Microchip on the left has black spot/mark.

@9:12 it looks like the crystal/oscillator pin has broken off (could be the light though, not sure)... Perhaps try another oscillator..?

Any update on this? I also think that some of ripped pads on the connector are not grounded they may be connected somewhere.

The pin that was bent, was it bent inside the connector also or just on the top? The no-connect pins might not be connected to the board but perhaps they are supposed to be connected together in some way?

I have a question for Alex, or anyone else that does this sort of work. I solder camera cables onto USBs for medical devices at my job. They will not allow us to apply flux, just use flux cored solder when soldering very small insulated wires to the USB pads. The problem is you have to add solder to add flux if you get a dry joint, and these pads and wires are small enough to have to be soldered under a microscope. I have tried to ask my supervisor why this is and all I ever get is "Because we told you to". Is there a reason you can't add paste flux when soldering insulated wires?? When you touch up such a small solder joint with more solder it makes such a mess and it seems to me it would be so much easier to just add a touch of flux and apply some heat. I have saw badly corroded USBs on older devices that are in for service, I wonder if that is what they are trying to avoid??

@MoooHamMad

Жыл бұрын

You always have to clean leftover flux with alcohol. Flux corrodes metal.

@zaprodk

Жыл бұрын

@@MoooHamMad Depends. There is flux'es that you need to wash off, others are "no clean" flux'es.

Maybe the 3 no connect trace's need to be connected to ground ??

You need to keep a "known good" screen , otherwise it might me the board .

I was hoping to see an update on the C.P.S video but see its no longer up. Hope those scammers get caught.

@SilenceWillNotBeTolerated

Жыл бұрын

He took it private.

Visual inspection is key- testing - when in doubt - They should leave it the professionals

Check the support pad 😊

Could it be the missing connector mounting pads on the sides of the connector are ground?

Wild thought.... Those 4 not connected pins on the screen connecter - the missing pads - are you sure they're not required to be shorted together - on in pairs even? Just check another board for anything odd in that area..

what happened to cps video

@tim.martin

Жыл бұрын

I was halfway through watching, too bad it's gone, was interesting AF. My guess is advice from a lawyer said "take it down until this is resolved". For sure Alex wants to share it with us, as much as I wanna see the second half of it.

Dear friend , thank you for your videos , actually we do like your video , but we don't have time for seeing you repairing laptops and other devices , unless you teach us how to repair and help the community of repair guys, it would be great if you explain and teach us the repairs method , we are happy for you for doing good repair , but we want to repair too and we want to learn too , so please save us time and start your teacher character, it will be grateful move from you , thanks again

If it does have a driver chip take it from donor one n give it a try. Some has single chip for everything so you can replace it too, probably chip has a fault inside. Could be filters too.

So Alex, how did soldering the other screen into the connector go? lol 22:45 Another great video my friend!

Where can I find the directions that show the easiest way to take H&S or bulldog tuner apart ? Thanks

If the short circuit was on the crystal oscillator, it is definitely after the processor

I think you should change the component in 6:18 that you found hot maybe gone bad due to over heat , nice job as always.

That's the first time i've seen a crystal oscillator fail shorted! - It's not a "chip" as such.

Just use two wires to complete the circuit for the coil. The coil is possibly a noise filter.

I feel that pain from the whistle .

Perhaps the bent pin on the connector that was straightened is the issue.

if you have a functioning board lying around or an easy-fix board is it not possible to swap the whole thing?

Alex, I got my first hot air station a Yihua 8786DI. I desoldered and soldered a switch potentiometer for a car air con successfully. Then I moved to a problematic motherboard which kills ram and tried to desolder the corresponding mosfets but I couldn't do it. I stopped because pitting is starting to form beneath the tiny mosfet. I played with the air speed and raised the temperature all the way to 480 C. I used basic rosin flux paste and put some leaded solder on the legs. Nothing helped. What do?

@edups3307

Жыл бұрын

@Christos seems like it

Alex, I only got 5 minutes into your latest CPS video before it got removed. What happened?

What's the hot air temp set at?

if the components from the donor board are not damaged you can transfer everything to it and check if it works

@PatricioRomero_xumi

Жыл бұрын

he'd have to check since he blasted it from below to get the connector :(

When you replaced the screen connector the 20th upper pin from the right was not looking good

One trace seems to be broken above the '3' mark (left side) at 26.45 time of the video

please check X1 component from other donor board.

Does the far Err-um ca have Brightness or Contrast control and what are the setings? APU I dropped a like...

How for you to replace the CPU socket on a ASRock x99 taichi ?

May I know your camera model?

I think the part you replaced its a cristal, and I think when cristal goes shorted its because main chip is bad

👍👍

I was watching a 2 year old vid of yours. You had a bad zero ohm resistor. I work on boards almost daily and have never come a crossed a bad zero ohm. Have I just been lucky all these years? thanks.

Are manufactures coming up with their own part numbers for components? I could find nothing on that 5-legged component. DCP1505 L301

Every second that we guess is $100 dollars. I like that joke !

i never seen before a quartz cristal this kind of defective!

Love how you work.Sometimes no fix are better and interesting then fixes

He was 0 for 3 in plugging in the USB cable the right way the first time

🙏👏👏👏🙏

How often dose that happen

Better than factory

Why don't you throw away the old screens that you marked with an x?