Coppell TV Repair LLC offers new replacememt NAND flash / EEPROM IC containing the firmware and data partitions for the main board 3642-1252-0150 used in Vizio M420SV LED TV.
Please read carefully the below information and specifically the warranty conditions section!
Do not hesitate to ask if you have questions and good luck with your TV repairs!
The EEPROM / flash memory IC found on Vizio main board 3642-1252-0150.
The IC has TSOP-48 SMD package and is located on the back side of the main board. It is labeled U12.
The IC we will send is brand new and contains the firmware for Vizio M420SV LED TV.
Medum to advanced. The memory IC requires soldering by experienced technician with quality soldering tool.
Hot air is recommended over soldering iron for taking the old IC.
In general, NAND Flash EEPROMs can fail in many different ways and cause all kinds of failure symptoms.
Virtually any kind of weird TV behavior from being totally dead to randomly shutting down to being slow or apps failing etc can be attributed to a defective EEPROM.
Unfortunately many if not all such failure symptoms can also be caused by other failures.
So there is no one simple and definite way to tell if a bad EEPROM is reason of failure in almost any TV, nor there is an easy and certain way to test an EEPROM.
When in doubt we always test EEPROMs in a good working board and most of the time the easiest way to rule out an EEPROM for a user in doubt is to just replace it woth a brand new one from reliable source.
All that said, there are a few common issues that Vizio M420SV develops due to bad U12:
- TV starting up and responding very very slow to commands - be it from remote or buttons, until it eventually hangs down and restarts; if left on an HDMI input or TV, however, it may play for quite some time;
- TV hanging on the VIZIO splash logo screen; this is not necessarily due to bad EEPROM, but it is known to have been caused by bad EEPROMs and bad copies in particular.
Repair service offered: Yes. If you consider the job too difficult or if you have reasons to believe the problem is not in the memory IC or if you would like to use the benefits of the warranty our repair services carry (and which our repair kits do not) search at our site for a risk free repair service for Vizio M420SV main board.
Coppell TV Repair LLC does not guarantee that this product is all that is needed to resolve the problems with your TV.
Most of the repair kits we offer are based on first hand experience servicing boards at our repair facility.
Over time they may get expanded with our own experience or information from manufacturer service bulletins, customer feedback etc.
Yet failure can be unique and there can not be guarantee that what has worked one, ten or even hundred times will also work the next one.
Just as important, every repair involves about equal portion of quality of parts and quality of worksmanship and as we have no control over the worksmanship quality unless we are the ones performing it we would be unwise to provide warranty of the products utilized by that worksmanship.
As such, no warranty is offered on this product once the components in it are soldered on a board.
If you would like warranty please see if a REPAIR SERVICE is offered instead of a kit. Unless otherwise noted all our repair services do come with a standard warranty.
Coppell TV Repair LLC is not aware of an easy and reliable way available to end users that will allow them to identify beyond doubt a defective or corrupt memory IC.
We describe failure symptoms that we have seen when the firmware IC was corrupted, but those symptoms do not directly map to defective memory IC and the other way around - an EEPROM can be deffective or corrupt and there may be other symptoms that are not listed here.
It is up to the buyer's technical skills, equipment and willingness to assume the risk for the outcome of their repair service effort when purchasing and using this product!
By placing an order customers agree to assume that risk and hold Coppell TV Repair LLC free of accusations and charges related to the outcome of their repair except in regards to the correct presentation of the product and its delivery.
Coppell TV Repair LLC guarantees that the offered memory is new, tested and functional to the best of company's knowledge.
To anyone who does not have the skill and equipment needed to diagnose the IC in their own board we strongly recommend using a purchase/trade-in or a repair service, which we may (and should) be offering for the main board.
Here is how we test the U12 NAND Flash EEPROM H27UAG8T2BTR for Vizio M550SV before we use or sell them:
(The EEPROMs for M550SV and M420SV are very very similar, but not exactly identical)
SHIPPING AND HANDING
Products will usually ship on the next business day after purchase is placed and paid. Unexpected delays may occur. If you do not receive a tracking number or message from us within 3 business days after purchasing please contact us.
When shipping method is specified during payment it is our first choice to utilize that method for shipping.
Yet sometimes it is not possible or may result in delays, e.g. a late Friday FedEx shipping of inexpensive and durable product may have a chance of being shipped in Friday than the following Monday; in such cases we reserve the right to substitute FedEx Ground with USPS Priority and, in some very rare cases, USPS First Class service. If shipping costs differ significantly you are in your right to contact and request price adjustment.
When shipping option for the order is "Free shipping" we will usually utilize cheapest available method.
See below for important disclaimer regarding the USPS First Class Mail packages.
We do not advertise delivery time and do not take responsibility for delays to packages as long as tracking information proves they have been shipped in a timely manner by us.
Be advised that the following delivery services are NOT insured per USPS policy:
- Domestic: USPS First Class;
- International: First-Class Package International™, Priority Mail International® Flat Rate Envelopes and Priority Mail International® Small Flat Rate Boxes; services to some countries may also not be covered, for details read the USPS article on the subject.
What this means is that if you choose any of the above services as your delivery method you agree to hold us free of claims against loss of value should your package gets damaged or lost in the carrier system as long as the tracking information by the carrier shows the package was accepted by them and processed into their system.