Where is the zoom button on my HP Pavilion F1703 17 desktop

Unless you have a keyboard with a power on function you will need to replace the switch.

Press the power button to get it out of sleep mode.

Sleep mode, think of it as a power nap.

The beeps are a code that tells you what is wrong and they vary by BIOS manufacturer. The reference is here:
http://support.hp.com/us-en/product/hp-pavilion-slimline-s3600-desktop-pc-series/3999463/model/4006368/document/bph07107

This is because the monitor's Power Button Lockout function is enabled. Press and hold the Power button for 10 seconds to unlock the Power button function. Your sleep problem should also be related to the lockout issue.

Try ebay. or: http://www.sparepartswarehouse.com/HP,Pavilion,a1400,ER890AAR,Computer,Parts.aspx

Hi,
Depending on the browser you are using you could get smaller text just pressing Ctrl and - If you press Ctrl and + you get bigger text.
If you let me know the browser you are using maybe I can help further if this does not solve it.
Regards
DL

Your question requires some clarification but I will try to sort your problem out.

Now I do not know exactly what is you computer's configuration (OS, software etc) so if my advice doesn't work do not get frustrated but think of it as a clarification request and reply back with additional feedback.

Now for the solution part, I assume that you are talking about an Internet browser like Internet Explorer or Firefox etc.

Your son used the zoom feature which you can use to your advantage. Just follow these steps:

1. Open Firefox or whatever browser you use and navigate to the website which you think has been 'zoomed out'
2. Press and hold the Ctrl key and press 0 key to set it to default zoom level.
3. To zoom in press and hold Ctrl and + keys and - key to zoom out.

Note that you can also zoom in or out using the mouse wheel (if present) with the Ctrl key pressed.

You can now zoom in or out any page to reduce eye strain. Hope this helps.

Hi, most motherboards that I have fixed etc... have used the 3.0V CR1620 Button Cell Battery which is easily available and cheap!

you need to get the reset disk for windows

Read this HP forum thread. You may want to try some of the recommendation.