V570 LESS THAN ONE YEAR OLD: Mainboard replaced twice, overheatin​g, broken HDMI. And that's typical!

Question

Is this a lemon? How should Lenovo handle this?
Hello. From very beginning, shortly after purchase, V570 overheated (80-90 degrees Celsius, with screen shots of core temps as proof). Problem went on for several months, burning leg at one point. I called tech support, no call back and no repair scheduled. Kept notes, dates and times of all contact.
I had purchased next day on-site repair service for three years. So when no one called back about problem after ten days, I called back and raised a little pleasant ruckus. Got some action.
On-site tech installed more powerful fan. Helped out with high temps. Tech recommended motherboard to be replaced, since it was probably fried from overheating.
Then, the HDMI port no longer worked. Lenovo took more than a week on this repair. Parts were sent to a technician who was no longer in business, so parts were in Fed Ex limbo. I spent 10 hours on phone (5 hours to the Philippines) trying to straighten out the mess.
Problem escalated. No one from North Carolina or Texas ever calls back. No. Call. Back.
You can imagine my trust factor with Lenovo is zero now.
New mainboard installed. Works fine. Tech leaves. Two hours later, screen is completely black. Nothing. Dead darkness dead dead. Cannot power on. No tricks with power button, recovery button or anything else working.
Called support again about dead machine. Sending out another mainboard for another repair. I do research and realized this is the bad bad bad motherboard that *everyone* here is complaining about. Lots of other dead black screens from it. So, again another two hours on the phone.
Then, I call tech in Philippines back, and say, hey, this is the mainboard that is riddled with problems -- I really do not want to go through this again. They recommend another mainboard, but it's a slower one -- an i5 dual core instead of quad core.
At this point, we're three or four mainboards in, in terms of repairs that have happened and parts coming, on a machine less than a year old.
At what point does Lenovo make the financial or business decision that the best option is to replace the machine rather than paying for four motherboards and on-site repairs?
And, BTW, when I pay hundreds of dollars for a 3-year on-site next-business-day repairs, I mean ON-SITE, NEXT BUSINESS DAY. That's what my contract says, in writing -- I've got it in front of me. That doesn't mean 2-3 business days that all the techs are saying to me. 
I've even had several techs say I need to send in my machine, and I say, uh, I have on-site repair, and they say they "need to get approval" to authorize on-site service. **bleep**??
This is the worst customer service and the poorest machines I've ever encountered.
I also have a 2-month old y570, that arrived with a broken battery bay and still the touchpad is as stiff and unusable
as Day One.  Both the lower housing/battery bay and the touchpad have to be replaced or repaired.
I'm gathering that others are having as many problems with their machines as I am having with mine. And even when you pay for good service -- you don't get it.
IdeaPads bear no resemblance to the greatness of ThinkPads or the IBM of yesteryear.
Lenovo, please help.

Answer 1

Unfortunately, the carrier that you purchased it from is where your warranty channel is. I wish I had a better answer but that is how the system works.
As I mentioned, even if you are within the warranty period and with the same carrier, the warranty is probably void since the device has been disassembled and repaired--they can tell when it's been apart. I've heard of this mirrored issue before and it's usually a hardware problem, as you've already been made aware of by the repair facility you took it to.
I hate to say it but you are probably out of luck on this one. Wish I had something better to tell you.
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