Spot screen Maestro

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  • Updated 2 months ago
 Already suggested putting the screen off when the Maestro is not used.

 Tom said there is no problem that the screen is made for that.

But today i have many spot on my screen

if I send it for repair that will pay. Sorry for English I'm French
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Jean Drolet

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Posted 4 months ago

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Jean Drolet

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Jean Drolet

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Mike - W8MM

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I have the same problem.  It just started doing this.
(Edited)
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Pat N6PAT

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I would send it in right away. If you try to fix it yourself you may void any warranty

From Jean's pictures it looks like the tablet is expanding
(Edited)
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Mike - W8MM

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I have initiated a helpdesk ticket.  We'll see what they advise.   I assume my warranty is long gone.
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Pat N6PAT

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If it's a battery issue you might not want to leave it on unattended
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Jean Drolet

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the tablet is disassembled and the pieces are on order ;)
(Edited)
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Pat N6PAT

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@Mike - just wondering if the battery is swelling like in Jean's case how would you ship it to Flex? Wouldn't that be unwise?
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Pat N6PAT

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@Mike, how old is your Maestro? Jean says his is 3 years old.
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Pat N6PAT

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@Mike, how old is your Maestro? Jean says his is 3 years old.
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Mike - W8MM

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I think about the same age.  I really don't remember, but I got them when they first were available.
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Pat N6PAT

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I was just wondering if it was the age causing it. if it is then you should be able to find other comments about that table on the internet
(Edited)
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Jean Drolet

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The age just after 3 years
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kz1w

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I've taken my Maestro apart after second Dell tablet failure, batteries both times.  The battery is right behind the lower part of the screen.  It failed (expanded, vomited, blew up, whatever,..) and distorts the screen.  In my case it destroyed other parts (SSD?) as it won't boot.
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Jean Drolet

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If you change the battery it is important to charge the tablet with an external charger before installing it.

If the tablet does not seem to start, it may be in DFU mode. There are some combinations to do with the buttons to do at startup to get out.

sorry i'm frech .. google translate ....
(Edited)
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Art - N4QNT

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There is no screen saver function?
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Pat N6PAT

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Those brown areas on the bottom look like burn marks
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Jean Drolet

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Parts to repair the Dell tablet on order. 1 battery and 1 screen.

yes it's a Dell tablet venue 8 pro inside.
(Edited)
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Mike - W8MM

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Did you do this as your idea, or did Flex advise you?
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Jean Drolet

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I repair without going through flexradio
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Steve K9ZW, Elmer

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In last picture is it showing that the Battery swelled?

73

Steve
K9ZW
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Jean Drolet

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after 3 years there is no warranty
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Pat N6PAT

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Jean, is the battery swollen or leaking?
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Jean Drolet

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the battery is swollen and the screen seems burned at 3 place at the bottom
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Pat N6PAT

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That sounds very bad
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Jean Drolet

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All part in order and old part in the garbage
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Al / NN4ZZ

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Had this happen to a phone that I would leave charging most of the time....repair shop said same thing as below and that it was a fire risk in addition to the excessive heat resulting in damage to the device.  

Regards, Al / NN4ZZ  
al (at) nn4zz (dot) com




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Mark Erbaugh

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Does this mean that the M should not be plugged in the whole time. If we leave the M unplugged long enough, the internal battery will discharge to the point where the M's charging circuit won't recharge it.

I've been leaving my M plugged in to it's power supply 24/7. I use it several times a week. I rarely move it away from the operating desk, I use it more like a desktop radio. Should I adopt some procedure of unplugging the power supply?

My M is one of the first ones made.

73,
Mark
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Bill -VA3WTB

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Mark, how many reports have we seen with this happening? For me I think it is the only one I have heard about.
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Jean Drolet

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It's one too many.  The screen burned in 2 places very visible. If the Maestro's battery is not discharged regularly, it becomes overloaded if not disconnected from the charging.

A check of the battery condition is to be done.

My Maestro is from the first generation.

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Bill -VA3WTB

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Jean, my comment was in regard to someone being concered that they should start doing something differently. My point was,, that it is very uncommon and yours is the only one I know of with that problem.
Yes, any problem is one too many,,but in perspective...
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Ron W4RDM

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I know of four so far.
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Jean Drolet

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New screen , new battery install in 15 minute
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Jean Drolet

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Bob G W1GLV

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Was the screen purchased from Flex Radio? If not where did you purchase it? Thanks
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Jean Drolet

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On Aliexpress B080EAN01.1 LCD display + TOM80H12 V1.0

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Jean Drolet

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Jean Drolet

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make sure your touch cable version. One touch cable version is T01D002TOM80H12 V1.0 The other version is T01d001 5468W
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Ron W4RDM

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Looks like my Maestro has similar spots. It’s a first gen, been plugged in and on 24/7 - 365 for the last ~3 years.
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Pat N6PAT

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Given the pictures that Jean posted of the swollen battery I would be very reluctant to use it
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Ron W4RDM

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It's been this way for about a year. It's on 24/7
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Mike - W8MM

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One of mine is on its way to Flex to sort out the same issue.

I have 3 Maestros of the same age (very early) and 2 of them have the spots now.
(Edited)
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Pat N6PAT

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Interesting. You need to keep the internal battery charged but how do you know when it's overcharged? According to what NN4ZZ posted overcharging is the cause of swollen batteries.
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Tim VE6SH

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Is Al saying the internal battery is the issue or the larger Li-ion batteries used in the battery compartment? 

Tim VE6SH
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Pat N6PAT

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If it's generating enough heat to leave burn marks on the screen then common sense would say not to put your face near it.

I would think it's not a good idea to even turn it on or leave it charging until it's fixed.
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Al / NN4ZZ

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Hi Tim,
When I had a problem with my Samsung phone battery, the tech at “Batteries Plus” said they see the swollen Li-on batteries frequently on phones, laptops and other small devices. He said leaving it plugged in continuously was the most common cause. And he noted that they can overheat and cause damage to the device, screen, etc. Even catch fire in rare cases.

On a related note, he said devices that use larger Li-on batteries (drills, saws, etc) and use detachable batteries often have a smart charger system . These have a more sophisticated battery management system that monitors the charge state and shuts down when they are fully charged.

The article I posted above basically confirms what I was told by the tech.

I don’t have any particular knowledge about the Maestro batteries and charging system. The Batteries Plus tech suggested to disconnect my phone charger when I see the phone shows 100%. So while I do unplug it occasionally, it is not convenient or something I do all the time.

FRS may have some additional input or recommendations.

Regards, Al / NN4ZZ
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Ron W4RDM

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I have two Maestro's about the same age. Only one has the spots and it's been plugged in and on for about three years. The other one(without spots) has been plugged in but only used sparingly. 
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Bill -VA3WTB

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I don't know about leaving the Maestro plugged in 24/7
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Jean Drolet

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Important Note: Maestro “A” models (those with serial numbers in the form xxxx-xxxx-0100-xxxx) must be connected to DC power for 15 to 30 minutes every 4 to 6 weeks of non-use to ensure that the internal display battery does not completely discharge. If the display battery discharges, the Maestro will not boot, and a HelpDesk ticket will have to be opened to resolve the issue
(Edited)
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Jean Drolet

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But no information for 24/24 plugged
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Jean Drolet

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With my experience, the internal charging system of the Maestro is not able to recharge the battery if it is completely discharged.

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k3Tim

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First, thanks Jean for pointing this out and being the Vanguard as to the fix.

I observed these marks on the Maestro A here but did not recognize the problem. 
Popped the case on the Maestro, pulled the tablet and removed the battery. It had a bad gas of excess gas. This was relieved and the battery replaced. A new one is on order.

The 'burrn marks' were simply pressure on the liquid in the LCD.  Once the pressure was relieved, the LCD panel looks fine. 

The charging circuit is inside the Dell tablet so the origin of the problem is within, either the charger or the battery chemistry.  A Pixel 3 had the same problem and I repaired it this week (more challenging).

Thank you for the information....

Regards,

k3Tim
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Steve K9ZW, Elmer

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@k3tim - would you have links for the correct internal battery to share? A bit of how-to guidance would also help.

Thanks and 73

Steve
K9ZW

Blog: http://K9ZW.wordpress.com
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k3Tim

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Sorry for the delayed response...  The link Jean provided is similar to one ordered and it also ships from HK (awaiting for two to arrive).  Video to replace the battery:
https://youtu.be/N6AMRy4di0s?t=20

The tablet is help in place with rubber-like bumpers and can be removed using care. Once the bat is replaced the case snaps together and appeared as good as new. The marks on bottom of screen are gone. 
Placing the tablet back in place, one has to be sure the USB cable is connected ahead of time.  A thin screwdriver on the bumpers positions them to pull the tablet in place rather then pushing it away from the front of the case. As one pushes the tablet in place these bumpers grab hold of the tablet.  

_..--
Tim
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Jean Drolet

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Mike - W8MM

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Thanks to VA2JN & K3TIM, I fixed my other Maestro with the "burn spots" problem by replacing the tablet battery with a new one I obtained from a Newegg search for "3.7V 18WH Genuine Original 74XCR Battery Dell Venue 8 Pro (5830) Tablet 074XCR"

Now, good as new.