2nd monitor went black after upgrading on macbook pro

Ive read post; however, i need help with getting 2nd mointor to work. it was working fine before upgrade but now jsut black. I was hoping there was a new solution to fix this thuderbolt / 2nd monitor thing. Im not comutuer tec. guy so I was hoping the apple systems where a good plug and play.
any help out there??
thanks

My best guess is that you have fried the RAM with static electricity charged up in your body. According to OGELTHORPE a beep on startup is because of no RAM, if when installing you did not do it correctly, you could have fried the RAM, which then your mac will not recognize it. The same with the old RAM, if you tried to re-install it and didn't pull up your sleeve and rest your arm on the inside of the chassis, then it is fried, or if you didn't wear an ESD band and connect it to the the chassis, then it is fried.
Seen as though you can't startup your mac, I can't say to do an AHT, buy some new ram, and start with the lowest one you can, so its cheap for ya use a different company incase is that;) Crucial.com is really good, I got an 8gb upgrade from 2gb. Let me tell you, it's great!
Reply back;)
Chris

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Dear Community,
I am willing to donate 100 USD to anyone who is willing/able to provide concrete resolution to this problem.
I am a professional freelance videoeditor and my job is currently stucked due to inability to boot my macbook pro again.
After upgrading the RAM of my MBP (late 2007 model, 17'' display, Intel 2.4GHz Dual Core processor), the screen went black and the system did not boot any more.
I tried to replace the orginal 2 x 1GB DDR2 533 CL=5 SODIMM (single rank) with 2 X 2GB DDR2 800 CL=6 SODIMM (dual ranks).
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My best guess is that you have fried the RAM with static electricity charged up in your body. According to OGELTHORPE a beep on startup is because of no RAM, if when installing you did not do it correctly, you could have fried the RAM, which then your mac will not recognize it. The same with the old RAM, if you tried to re-install it and didn't pull up your sleeve and rest your arm on the inside of the chassis, then it is fried, or if you didn't wear an ESD band and connect it to the the chassis, then it is fried.
Seen as though you can't startup your mac, I can't say to do an AHT, buy some new ram, and start with the lowest one you can, so its cheap for ya use a different company incase is that;) Crucial.com is really good, I got an 8gb upgrade from 2gb. Let me tell you, it's great!
Reply back;)
Chris

Monitor went black after changing resolution

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Hardware Overview:
Model Name:          MacBook Pro
Model Identifier:          MacBookPro5,2
Processor Name:          Intel Core 2 Duo
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Number Of Processors:          1
Total Number Of Cores:          2
L2 Cache:          6 MB
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SMC Version (system):          1.42f4
Sudden Motion Sensor:
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Is it possible to upgrade a macbook pro 15 late 2008 memory from 4 to 8 go. And if yes would i have to replace both memory modules.
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Hi CMCSK and thanks.
Maybe it's because of the SMC reset I've done.
My computer wasn't responding to the power button when pressed and used to shut down unexpectedly so I did the SMC reset as per the procedure hereafter.
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So according to you, the battery seems to work properly and doesn't need to be replaced.
Don't know if it's important but the figures I gave where the one with magsafe connected.
In fact for the time beeing I only use my computer with magsafe plugged.
I just unplugged the magpower and here are the new figures after 10 minutes.
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Charge Remaining (mAh):          3103
Fully Charged:          No
Charging:          No
Full Charge Capacity (mAh):          3491
Health Information:
Cycle Count:          245
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          -1431
Voltage (mV):          11816
Are these figures still ok ? Thanks for your help and have a good day.
Francis

2nd monitor went black after upgrading on macbook pro

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