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PLEASE HELP ME!
My brother owns a HP Pavilion dv7 (s/n 3CE90635L3) lap top.
Yesterday I borrowed it (without asking) and used and HDMI cable to connect it to my tv to watch some videos... I connected the pc to the tv and changed it so that instead of having 2 monitors the image shows up only on the tv! Everything worked fine so I watched videos on my tv all night long, I went to sleep and left the lap top still on only turning off the tv, today I woke up, turned the tv on and everything was working fine! So I watched a few videoclips but suddently had to leave, so I just paused the videos and turned the tv off (but didnt touch the pc leaving it on).
Now I have got home and the lap top was on but no image on the tv! I turned it on and off a few times and reconnected the cables a few times aswell, but nothing! I started to freak out because when I disconnected the HDMI cable there was no image on the lap top screen aswell!! I turned the lap top off, disconnected the cable and turned it back on! NO IMAGE!!! I tried restarting it again and again but no luck... I also tried to use the Fn key with the "monitor" key but nothing happends!!
Here is what is happening to the lap top every time I turn it on: It makes a turning on sound (i think its the inside fan) but right after the sound stops... The screen turns on (still black, but glows) and then off again real quick... The lights all turn on, but the capslock light keeps flashing... The disc tray also keeps making some weird sounds every 20 seconds and its light also keeps flashing!
My brother returns home in two days and I really really wanted to get this fixed BEFORE he notices it! If it's a problem I must take to a professional to fix it is ok, but I want to know what is it first so that I dont get overpriced!
All help is aprecciated, thanks already!

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Dani AI

Generated

Short diagnostic summary for and :

The symptoms described (system powers up briefly, the LCD backlight glows then goes dark, the Caps Lock LED blinks in a repeating pattern and the optical drive clicks) point to a startup/POST or firmware/hardware fault rather than a simple Windows display-mode issue. The two priority actions are: (1) record the exact Caps Lock blink pattern (count long vs short blinks and how it repeats), and (2) perform a full power discharge/hard reset before deeper teardown. ()

Recommended immediate diagnostics (in this order):

  1. Power-reset: shut down, remove AC and battery (if removable), eject any discs and remove USB/SD devices, then hold the power button ~15 seconds to discharge capacitors; reconnect AC and test. ()

  2. Note the blink code exactly (e.g., "two long, two short") and compare with HP's blink/beep table — that mapping directly points at BIOS, memory, CPU or other subsystems. If the code matches a BIOS-corruption pattern, follow HP’s BIOS-recovery steps. ()

  3. External-display test: connect the TV/monitor again, power on, and use the display-toggle key (Fn+display-key). If the external shows the BIOS/HP logo while the laptop LCD stays dark, the problem is almost certainly the panel, inverter or display cable. If both screens are blank and the blink-code indicates a POST fault, the motherboard/firmware/RAM or CPU is likely at fault. (h30434.www3.hp.com)

Additional notes and next steps:

  • Reseating the RAM sticks and trying a minimal boot (no HDD/optical, one RAM stick only) can rule memory in/out before assuming board failure. - If the blink pattern points to BIOS corruption, attempt HP’s BIOS recovery (Windows+B or Windows+V recovery method, or recovery USB per HP instructions) before paying for board work. - If uncomfortable opening the case or the blink code indicates mainboard/CPU, seek a shop that offers board-level diagnosis; screen/cable fixes are much cheaper than motherboard repairs. (h30434.www3.hp.com)

Record the exact blink pattern, which tests were tried (power reset, external monitor, RAM reseat), and whether the external monitor ever shows the BIOS logo — that information is what a technician will ask for and what determines whether this is a display-cable/panel repair or a board-level service. ()

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Member Avatar for caperjack

hello ,not sure I can help, but will try ,my first question is ,what did you have the laptop sitting on when you left it on all that time

Member Avatar for cafemaia

sorry for taking so long to answer you.... it was on top of the same table the tv is, right beside the tb!

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