HDMI connection problem with Lenovo B570. TV no longer recognizes input.

[RCoop2]

My Lenovo B570 and Samsung LCD TV will no longer couple under normal operating circumstances.

- The laptop and TV used to connect well. The laptop screen would flash and auto-resize the resolution and then appear on my TV. Piece of cake.

- Over the last several weeks, I started having problems with the cloning process. Sometimes the TV would clone; sometimes it wouldn't. I'd unplug and reinsert the HDMI (in the laptop), and it would clone after a few tries. Sometimes I would restart the computer and that would sort out the problem. Recently, however, I simply cannot get the TV to clone the laptop. It just says "No Signal" after briefly searching for a signal.

- I attempted fixing the problem using multiple HDMI cables and different HDMI ports on my TV. When I plug in the HDMI cable into my computer, the TV says "Searching for Signals" for 10-15 seconds then switches to "No Signal". When the cable is unplugged, it says "Check Signal Cable". I also tried it with a different HDMI cable. Thus, I'm assuming the problem isn't with the cable.

- I restarted the computer in safe mode with the HDMI plugged in, and lo and behold, the cloning works. Thus, I'm assuming the problem isn't the HDMI port on either my laptop or TV.

- I restarted the computer normally, and the cloning works until the login screen. At that point, the TV switches to "No Signal".

- I attempted reinstalling the driver for the Intel HD graphics 3000. The cloning works immediately after the driver is installed, but upon reboot, the cloning doesn't work. Note that the laptop resolution doesn't auto-resize like it used to.

- I attempted reinstalling the drivers for the Intel chipset. That didn't work either.

Does anybody have some input that might help me resolve this problem?

[RCoop2]

My dxDiag data are below:

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System Information

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Time of this report: 8/13/2013, 22:04:46

Machine name:

Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130708-1532)

Language: English (Regional Setting: English)

System Manufacturer: LENOVO

System Model: 1068A2U

BIOS: Default System BIOS

Processor: Intel(R) Core(TM) i5-2410M CPU @ 2.30GHz (4 CPUs), ~2.3GHz

Memory: 4096MB RAM

Available OS Memory: 4010MB RAM

Page File: 1442MB used, 6575MB available

Windows Dir: C:\windows

DirectX Version: DirectX 11

DX Setup Parameters: Not found

User DPI Setting: Using System DPI

System DPI Setting: 96 DPI (100 percent)

DWM DPI Scaling: Disabled

DxDiag Version: 6.01.7601.17514 32bit Unicode

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DxDiag Notes

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Display Tab 1: No problems found.

Sound Tab 1: No problems found.

Sound Tab 2: No problems found.

Input Tab: No problems found.

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DirectX Debug Levels

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Direct3D: 0/4 (retail)

DirectDraw: 0/4 (retail)

DirectInput: 0/5 (retail)

DirectMusic: 0/5 (retail)

DirectPlay: 0/9 (retail)

DirectSound: 0/5 (retail)

DirectShow: 0/6 (retail)

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Display Devices

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Card name: Intel(R) HD Graphics 3000

Manufacturer: Intel Corporation

Chip type: Intel(R) HD Graphics Family

DAC type: Internal

Device Key: Enum\PCI\VEN_8086&DEV_0116&SUBSYS_397517AA&REV_09

Display Memory: 1696 MB

Dedicated Memory: 64 MB

Shared Memory: 1632 MB

Current Mode: 1366 x 768 (32 bit) (60Hz)

Monitor Name: ThinkPad Display 1366x768

Monitor Model: unknown

Monitor Id: LEN40B0

Native Mode: 1366 x 768(p) (60.000Hz)

Output Type: Internal

Driver Name: igdumd64.dll,igd10umd64.dll,igd10umd64.dll,igdumd32,igd10umd32,igd10umd32

Driver File Version: 9.17.0010.3062 (English)

Driver Version: 9.17.10.3062

DDI Version: 10.1

Driver Model: WDDM 1.1

Driver Attributes: Final Retail

Driver Date/Size: 3/8/2013 19:10:18, 12615680 bytes

WHQL Logo'd: Yes

WHQL Date Stamp:

Device Identifier: {D7B78E66-4256-11CF-EC7F-7F19B7C2C435}

Vendor ID: 0x8086

Device ID: 0x0116

SubSys ID: 0x397517AA

Revision ID: 0x0009

Driver S...